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Poll
Question: FUel Pump Problems - Have you had any?
No, no problems yet!
Yes, covered under warranty.
Yes, not covered under warranty.
What is a FUEL PUMP?

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Author Topic: FUEL PUMP PROBLEMS:: Please post YEAR and MILEAGE  (Read 49225 times)
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« on: 05/03/05 06:44 AM »

Just out of curiosity, and brought to my attention by another member,   figured I'd post to see WHO has had problems with their FUEL PUMPS on the Avalanche, and what YEAR is the truck, and what MILEAGE/KM did it happen at!


2002 SOM AV  ->   replaced fuel pump last week, under warranty,   at  38,800 Kilometres!!  (approx . 24,200 Miles)
« Last Edit: 05/03/05 06:52 AM by Yakmar » Logged

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« Reply #1 on: 05/03/05 06:49 AM »

No problem here .... 50,000 miles 2003 4x4 z-71 ....
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« Reply #2 on: 05/03/05 06:52 AM »

No problems, 2003 Z71 with 53,000 kms..  and primarily use Shell fuel!
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« Reply #3 on: 05/03/05 06:53 AM »

No problems...

3 7/12 years
56,000 miles ish....
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« Reply #4 on: 05/03/05 07:08 AM »

(didn't vote in poll)

no probs with fuel pump per se, but did have tank dropped to replace sending unit for gas gauge under warranty (many have had this done).

Now after warranty, and gas gauge has acted up again two different times.  Experimenting w/ changing gas brands and/or using fuel additive to try to resolve the issue.  Fuel additive seemed to work once, but after couple more tanks, problem is back.
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« Reply #5 on: 05/03/05 07:11 AM »

No probs @ 56k miles.
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« Reply #6 on: 05/03/05 07:37 AM »

02 the fuel pump went out at about 15K miles, was replaced under warranty, no problems since.
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« Reply #7 on: 05/03/05 07:39 AM »

2003 WBH, 60,000 no problems
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« Reply #8 on: 05/03/05 07:55 AM »

2004 WBH Z66 68,000 miles- no fuel pump problems (knocks on wood)
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« Reply #9 on: 05/03/05 11:21 AM »

No probs @ 16700.   2years, 1 Mo.
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« Reply #10 on: 05/03/05 11:33 AM »

My fuel pump died on my 2002 Av at about 55,000 miles. I was glad I could coast into a Sonic too. Would have hated to ask all those screaming people to help me push!!! 
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« Reply #11 on: 05/03/05 11:37 AM »

My fuel pump died on my 2002 Av at about 55,000 miles. I was glad I could coast into a Sonic too. Would have hated to ask all those screaming people to help me push!!! 
*hehe*   thumbs_up
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« Reply #12 on: 05/08/05 12:14 PM »

2002 and replaced at about 32K but what i understood the filter should be replace frequently.
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« Reply #13 on: 05/08/05 12:16 PM »

2002 and replaced at about 32K but what i understood the filter should be replace frequently.
Interesting.... nobody has mentioned about changing a filter in the fuel pump??? ANy more info on this?
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« Reply #14 on: 05/08/05 12:19 PM »

No problems '02 1500 4x4 13,000 miles

No problems '04 Z71 11,000 miles
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« Reply #15 on: 05/08/05 12:56 PM »

92k
2002
dead pump!

The filter in the pump is non serviceable, the filter along the frame is



Pump again replaced at 118,000 miles I need a hug
« Last Edit: 10/12/06 09:33 PM by Alaska_AV. » Logged

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« Reply #16 on: 02/09/06 11:05 PM »

2002
125k miles
Replaced Fuel Pump.
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« Reply #17 on: 02/10/06 06:34 AM »

2002
125k miles
Replaced Fuel Pump.

125,000  MILES!! HOLY GAWD!!! Thats a LOT of driving!!!  Shocked
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« Reply #18 on: 02/10/06 07:49 AM »

no Problems

2003 73,000 miles
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« Reply #19 on: 02/10/06 12:06 PM »

2003 WBH Z71 with 61,000miles at the time the fuel pump died on me 10 feet from the house.
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« Reply #20 on: 02/10/06 12:14 PM »

82,500 miles, 2003 WBH, no problems except the intermediate steering shaft.
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« Reply #21 on: 02/10/06 07:43 PM »

my 03 has a problem with the rear transfer pump.it eather a plug or pump they don't know.the scanner read that the pump was inop.but for $400 plus for the part it can what.
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« Reply #22 on: 02/14/06 12:52 PM »

My 2003 had fuel level sensor go out at 42000 miles and just had fuel pump go out at 47000 miles.....set me back around $800 +.  Dealer recommends changing fuel filter regularly since gas grades have declined. chevy
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« Reply #23 on: 02/15/06 06:51 AM »

 IHAVE AN 02 AV WITH 158K, NO PROBLEMS. BUT I TRY AN KEEP MY TANK FULL AND CHANGE MY FUEL FILTER EVERY 25 OR 30K MILES. THE REASON FOR KEEPING THE TANK FULL IS BECAUSE THE FUEL IS WHAT KEEPS THE PUMP COOL.
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« Reply #24 on: 03/06/06 03:36 PM »

2003 w/ 33K miles - just replaced fuel pump today. 
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« Reply #25 on: 03/06/06 03:44 PM »

No problems, I routinely see fuel pressures of 100psi.  Of course I have a 255lph booster pump and a FMU

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« Reply #26 on: 03/14/06 06:25 PM »

 Cheesy NO PROBLEM !!  2002 AV 52000 mil
kostas  Wave
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« Reply #27 on: 03/14/06 06:34 PM »

No problem 2002 39,400 miles
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« Reply #28 on: 03/16/06 12:01 PM »

2004 85.000km no problems, yet
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« Reply #29 on: 03/16/06 12:07 PM »

  '02 SOM Av, with 92,800 miles. No problem with fuel pump. (fingers crossed)
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« Reply #30 on: 10/12/06 01:04 PM »

Fuel pump died at 67000 miles. 

2004 Z71 Avalanche.

I've had ~5 injectors replaced when the vehicle was newer as well. 

I've been Chevrolet through and through but if someone at Chevrolet isn't smart enough to spec a fuel pump and filter that will last longer than this I think I'm going to switch to a Tundra. banghead
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« Reply #31 on: 10/12/06 01:09 PM »

Hey, I just wanted to say I knew it was the fuel pump before I even brought it in based on all the excellent posts here on this forum. 
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« Reply #32 on: 10/12/06 04:29 PM »

2003 61,600 miles, no problems, but when I bought my 1996 GMC brand new, the fuel pump went out at 7,000 miles.  Ticked me off because I bought the truck to replace my POS '88 GMC that gave me problems.  The letters "GMC", stood up to what they mean:
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« Reply #33 on: 10/12/06 06:02 PM »

03 Z71 53,000 miles. No problems, shut it off to get gas, wouldn't start when I tried to leave.

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« Reply #34 on: 10/12/06 08:55 PM »

No fuel pump problems with my 02 Z-66 after 52,000 miles.    I do change the Napa Gold filter every year and primarily run with over a half a tank of Shell gas.    With the engine running with rear wheels off the ground I have listened to the pump and it sounds good.   Nice constant buzz.   At 100,000 I am going to replace it along with the water pump, I would rather replace it before I have too.
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« Reply #35 on: 10/13/06 11:20 AM »

02 z66 with 103,000

Replaced last friday..no indications or anything.....just died on me on the highway going to work.

cost 1089.00 at the dealer
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« Reply #36 on: 10/13/06 05:13 PM »

My fuel pump on my 03 1500 started whining at 46,783 mi.
it went on for a few days or so & just stopped on it's own.

I am at 60,000 +  now & so far , knock on wood, no more problems.



« Last Edit: 12/02/06 07:12 PM by Big Bob » Logged

 
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« Reply #37 on: 10/13/06 07:01 PM »

02 z66 with 103,000

Replaced last friday..no indications or anything.....just died on me on the highway going to work.

cost 1089.00 at the dealer


O M G

I can change out 3 for that.............
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« Reply #38 on: 10/14/06 06:56 AM »


O M G

I can change out 3 for that.............

Must that cold alaskan climate!!
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« Reply #39 on: 10/17/06 03:44 PM »


O M G

I can change out 3 for that.............

yea, that's what I said
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« Reply #40 on: 10/17/06 03:46 PM »

02 z66 with 103,000

Replaced last friday..no indications or anything.....just died on me on the highway going to work.

cost 1089.00 at the dealer
Mine was done under warranty, and I'm pretty sure it was almost $900 Canadian, labour included!
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« Reply #41 on: 10/17/06 03:52 PM »

02 Z71 with about 140819 miles. Replaced filter other than that no problems.
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« Reply #42 on: 10/17/06 08:40 PM »

My 2002 needed one at 55,000. It would lose pressure when parked and not start unless the key was turned off and on a few times to prime it up. The check valve died. Once it started it ran resonably ok. I changed it and it solved the problem.
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« Reply #43 on: 10/19/06 07:52 PM »

had to replace in my 02 under warrany.  Was making noise and had it replaced before failure.
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« Reply #44 on: 12/01/06 04:07 PM »

Replaced fuel pump at 95,000 miles. Also, had induction system cleaning (fuel injectors). Very expensive, but the  '03 Z-71 runs like new again. Before the fuel pump completely failed I had some warning signs. The first early warning was the pump running too long with the ignition key on (engine off). The second warning was when I stalled out a few times. The pump finally failed completely while on the freeway and I had to be towed. I'm just glad I wasn't on vacation and in a desolate place!
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« Reply #45 on: 12/01/06 04:50 PM »

I also changed mine out under warranty aprox 38,000 km
on my 2003 Z-71 1500
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« Reply #46 on: 12/01/06 04:54 PM »

Replaced fuel pump at 95,000 miles. Also, had induction system cleaning (fuel injectors). Very expensive, but the  '03 Z-71 runs like new again. Before the fuel pump completely failed I had some warning signs. The first early warning was the pump running too long with the ignition key on (engine off). The second warning was when I stalled out a few times. The pump finally failed completely while on the freeway and I had to be towed. I'm just glad I wasn't on vacation and in a desolate place!


Interesting that you had the symptom of the pump running too long.  I have a friend with a Silverado (forgot what year) and his pump seems to run for ever after the truck is shut off.  I thought/wondered if it was a relay problem. 
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« Reply #47 on: 12/02/06 05:07 PM »

My old fuel pump not only ran too much, it was also noisy till the system pressured up. The new pump I had put in is hard to hear because it's so quiet. It also only takes about 2 seconds to pressure up and stop.
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« Reply #48 on: 12/03/06 03:48 PM »

I guess that I shouldn't complain.
I have 128,000 miles on my 2002 2500. I've been wondering the cause of the truck shutting off on the highway and having a hard time starting with less than a 1/2 tank.
I took the truck to the dealer and searched for codes. They found codes for BOTH the crank position sensor AND fuel pump!
Durwin
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« Reply #49 on: 12/03/06 04:20 PM »

47,500 miles on my 02-2500. No problems yet. I try to never let fuel level get below 1/4 tank. Change the filter about once a year. Going to have to clean the injectors one of these days.  Roll Eyes
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« Reply #50 on: 12/15/07 07:26 PM »

2002 Z71

125k miles
Replaced Fuel Pump Feb 2006.


180k miles
Had to replace Fuel Pump again July 2007

Both times over $1000, second time 650 miles from home and had to spend weekend in Duluth waiting for service

 Sad
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« Reply #51 on: 12/25/07 02:13 PM »

2003 Onyx Black Z71 - 145k miles and I have had it replace three (2 times and working on the third!)  I am currently looking for info to do it myself this time! banghead I need a hug
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« Reply #52 on: 12/25/07 07:56 PM »

Hey, gang,
     Will a slowly failing fuel pump cause a lean run condition? (Codes P0171 or P0174, or even th dreaded P0300?)

EJ
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« Reply #53 on: 12/26/07 06:36 PM »

02 Z-71 died two blocks from my house and replaced at 68k, covered under extended warranty.

Now as for the running lean condition, absolutely.  It screwed the he** out of my system.  When all was done they ended up replacing the pump, cleaned and bored out the throttle body ( love my mechanic), replaced the injectors and had to replace the new cats since the lean condition resulted in more fuel being pumped and clogged them.  When it was all done it ran like a raped ape.
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« Reply #54 on: 12/26/07 07:25 PM »

pondfly,
     Did you receive any SES lights, before the pump went?

My son's '97 S-10 Blazer, did the same thing. Quit all at once. But, we couldn't tell from any codes that a fuel pump failure was imminent.
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« Reply #55 on: 12/26/07 08:59 PM »

Still original 2002 with 114k.

I also change the fuel filter every 25k and rarely let the fuel get below 1/4 tank.
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« Reply #56 on: 01/05/08 11:14 PM »

2003 went last month @ 105K.  Died right in the middle of the intersection.  Thank God for AAA!
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« Reply #57 on: 01/09/08 05:42 AM »

2003. . . 105K miles.  Cost $350ish for the new pump.

The pump did not go out all at once.  It was intermittent over a 400 mile period.  I thought I had bad gas <water> due to problems starting 10 miles after I topped off the tank.  Swapped fuel filter and it ran good for the next 100 miles.

Changed filter again and idled truck for 2 hrs.  in driveway with no apparent problem.  Filter looked fine.  Had "lean run" code on both banks.

Pump finally gave up for good a week later.
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« Reply #58 on: 01/09/08 06:01 AM »

Just out of curiosity Ray, how often did you run the gas tank down to empty?

I have only let my fuel get down to the point where my low fuel light has come on only about 5 times in the 6+ yrs and 115K miles. It is my unproven theory that running the fuel down to less than 1/4 tank consistently contributes to fuel pump failure since the pump is using the fuel itself to keep the pump cool  Huh

Thanks Cheesy
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« Reply #59 on: 01/09/08 06:21 AM »

No problem 2002 59,000 miles
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« Reply #60 on: 01/09/08 08:45 PM »

"Just out of curiosity Ray, how often did you run the gas tank down to empty?"

02 Z71,
I've also heard about problems due to insufficient cooling of the pump.   

I always fill up.   .   .   .   never just add a few gallons.    But I do run it down till my low fuel light comes on about 1/2 the time before I fill up.    So there may be something to it.   
Ray
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« Reply #61 on: 01/09/08 09:31 PM »

 04 Z71, no issues as of yet, 54,000 miles, always run the tank 1/2 to full.
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« Reply #62 on: 01/09/08 09:37 PM »

No problem here 2002 Z-71 with 83,000 miles.
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« Reply #63 on: 01/10/08 04:58 AM »

But I do run it down till my low fuel light comes on about 1/2 the time before I fill up.    So there may be something to it.   
Ray

Ok thanks Ray!
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« Reply #64 on: 01/13/08 05:43 AM »

just changed fuel pump.  93700 miles, 2003 2500.
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« Reply #65 on: 01/14/08 08:58 AM »

Just a note to all.
I paid aroud $325 local for my new pump, and that price has also been posted in a couple other threads.

Somebody sent me an ebay link that had the pumps for $95 to $130.  
Worth looking into if you can accept the delay for shipping.
hxxp: stores. ebay. com/GLOBAL-AUTOMOTIVE_W0QQssPageNameZstrkQ3amefsQ3amesstQQtZkm

Ray
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« Reply #66 on: 01/14/08 12:49 PM »

LOL, I love it. Unless you run the tank dry the fuel pump is never exposed.

The pump is is in a bucket. fuel is drawn from the tank to the bucket before being pumped. The unused fuel is also dumped back in to the bucket from the return line.


Global from the above post has way fast shipping BTW.
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« Reply #67 on: 07/06/08 05:56 AM »

02 Av 2500 with 150K - Pump repaired.

It would be really interesting to know how many of the people who had their fuel pumps REPLACED actually saw the damaged or failed pumps? I wonder how many pumps were replaced ($550.00 for pump plus labor) simply because the dealer did not have the correct fuel level sender/fuel pump power wire harness. I went to two different GM dealers and two autoparts stores and none of them had the wire harness! Both dealers suggested replacing the pump because "it's probably on its last leg anyway"! I'm all for taking preventative measures, but $1,000.00 is a bit much when the failure is a 10 to 30$ part.

Is everyone asking for their failed parts like good, concientious consumers? Big laughter with tears

Always ask for the failed part as well as the box the new one came in (if available). It could save you some aggravation later.
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« Reply #68 on: 07/06/08 03:42 PM »

Was it an oxidized relay? I'd say most folks go with replacing the unit because they don't know (myself included) what to look for, specifically, in a fuel pump issue. Not to mention that it would be extremely difficult, if not, impossible to be so finicky as to demand a mechanic to make sure it is not a smaller part of the unit that is failing versus the entire unit. They'd probably charge you more in labor to check that than a new unit would have been worth.

I'm not saying that being a conscientious consumer is bad...quite the contrary. But I'd probably get laughed at pretty hard if I were to take my vehicle to a mechanic and state for him to be sure and check the fuel pump out thoroughly because it could be an oxidation somewhere or bad stator or a very inexpensive part of the fuel pump. Like I said, he might do that, but I'd have about 10-20 hrs of labor tacked on.

Me? I plan on making a panel under the driver side rear seat in my avalanche and purchasing a $100 fuel pump from Global on Ebay. They are completely identical to the Delco and a third of the price. So, for me, a 12 pack of beer, 30 minutes and $100 is all I'm gonna ever spend on a new fuel pump.
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« Reply #69 on: 07/06/08 04:36 PM »

the 2 I have gotten from Global have been stamped DELCO...... for what its worth.

They are in friends trucks, doing better than mine from the dealer.

Now they have a rebuild kit with only the pump, filters, hoses fer $50. Happy fathers day presant to me.... never leave home without it!
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« Reply #70 on: 07/06/08 11:26 PM »

NP 02 114,000 mi
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« Reply #71 on: 09/01/08 07:53 PM »

2002 at 62000. Fuel pump died. The shop hit me with $1100 for the pump, labor and towing. Charged $575 for the pump. Bend over...
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« Reply #72 on: 09/01/08 08:27 PM »

2002 2500, 122,000 miles on original pump.

Trying to eliminate a trouble code, I just checked pump last week and had 49psi @ idle and 59 psi @ WOT. Right within specs.


Randy
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« Reply #73 on: 09/01/08 08:37 PM »

Just don't let the fuel get low. The pump uses the fuel to cool itself.

If you run around with less than half a tank of gas yes you will have problems with the fuel pump
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« Reply #74 on: 09/02/08 01:23 PM »

Kind of ......


I have an '02 Avalanche with 49K with no problems; however, I also have a '02 Suburban which just had the fuel pump die. Typical failure mode is cranking for 5 seconds before it starts or taking 2 cranking sessions to start. This is a huge problem with the suburban and I have many friends that have this issue. It is my understanding that they share many of the same systems including this one.

In that vein, is there some place on this forum or in the service manual that describes how to replace the fuel filter. I looked very quickly at the service manual (the 6 various books) and did not see anything instructions for this. Thanks in advance for any help.
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« Reply #75 on: 09/02/08 06:00 PM »

If you have an 2002 Avalanche, the fuel filter is on the the inside of the frame rail under the driver side door. It is fairly easy to replace, all you need is a couple of wrenches and something to catch the fuel that is going to spill when you crack the fittings. You will also need a socket and extension to loosen the bolt that holds the clamp. Remove you fuel cap to releave some of the fuel pressure.
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« Reply #76 on: 09/03/08 12:55 PM »

Sorry. Not fuel filter .... fuel pump. I have seen a few links and it appears relatively easy but may take a few hours. I just wanted to see if there was anyone out there who has done this and has some advice, tricks, or cautions on this repair.  I don't expect to be doing this often so I am not interested in cutting the floor. I hope. Smiley
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« Reply #77 on: 09/18/08 06:10 AM »

08 LS 2WD

replaced at 4 months 9000km
than 500km (1 week) later back in shop to replace the gasket

guess dealer to cheap to replace gasket when putting in new pump


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« Reply #78 on: 01/06/09 06:54 PM »

My fuel pump just died after accruing 155k in the past 6.5 years. Fuel pressure is only generating 20-30 PSI falling to 0 after short time.


Pulling the pump on Friday after I get the new one from the dealer tomorrow.
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« Reply #79 on: 01/23/09 01:59 PM »

2002 Z71 103,000 miles. Fuel pump out.
Changed myself and saved $1000.00. Bought new one from Global Automative. Installed 2 weeks now. No issues yet!!!
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« Reply #80 on: 01/25/09 10:33 AM »

Av 2003 Z-71 - 58,000 No problems yet.
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« Reply #81 on: 02/05/09 06:03 AM »

I'll add my name to the fuel pump problem list; mine went bad yesterday.  2002 Avalanche, 96,000 miles. Tongue
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« Reply #82 on: 02/05/09 03:06 PM »

2003 Z66 with 94k miles - went out after I ran out of gas.
Started when I bought a brand new 2 gal. container with 2 gal. of fresh gas. It started and idled good. Then ran it for a few feet and started to bog down. Tried starting a few times but engine just cranks and would not continue to start. Had it towed to my house. Friend replaced fuel filter - still the same problem.
Friend cleaned throttle body with carb cleaner and idled and ran awesome. Took it for a test drive - better than new - great pick-up in performance.
The next day it started then I ran for a few feet then died again - exactly the same symptoms prior.
So maybe I am due for a fuel pump replacement - $$$$$$ !
Are the pumps on eBay just as good as the dealer pumps?
AutoZone sells them for $318.99 + tax. Install is 4.5 hours @ $85/hour - $$$$$ !   Help me!
Advise?
« Last Edit: 02/05/09 03:09 PM by molokini.maui » Logged
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« Reply #83 on: 02/05/09 03:25 PM »

If you read through this entire thread you will find the answers to all of your questions.

I would not advise buying anything but a GM fuel pump because other members here have had no luck with them. You can buy the GM pump through various parts places at a significant discount over the dealer. Gmpartdirect is a good source.

Your problem started by running out of gas. The fuel pump uses fuel to cool the fuel pump so if you regularly run you tank below 1/4 tank you are going to burn up the pump. 2 gals of fuel is not enough to keep the pump running cool.

If you also do a search for "Fuel pump" you will find more information than you ever wanted to know about replacing one. It is not an easy job.
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« Reply #84 on: 02/12/09 10:10 PM »

2002 Avalanche 1500 - Just had Fuel Pump fail on Monday at 135,000 miles. I am a very hard driver and while passing a log truck there was a hiccup. After clearing the log truck I continued to feel a slight hiccup but was able to nurse it home over 65 miles.

Cost to replace/install new fuel pump, fuel filter, and clean injectors was a big "ouch".

Still love my Avalanche but starting to worry that parts/systems will begin failing resulting in repair costs.

This truck has been an absolute keeper and is totally me. The newer Avalanche without the side molding isn't as appealing to me because that molding is great for deflecting rocks/etc. I have never kept any vehicle purchased new after it reached 90,000 but this truck and now I'm very nervous about the expense for future repairs.

I had planned to keep this truck for my daughter to learn how to drive (and share with me) but now I'm having second thoughts.
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this 02 forest green avalanche has hung strong. grill bra, regular maintenance, and it's ready to roll. i'm hard on my trucks but this one has continued to meet my needs. i have typically gotten a new truck every 3-4 years but this one's a "KEEPER" and my 11 year old daughter wants it when she's old enough to drive. I figure it'll be approaching 200,000 by then and probably be ready for a lighter foot on the gas.
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« Reply #85 on: 02/13/09 07:39 AM »

I see the posts about keeping the pumps cool by not letting them get too low.  Yes, this is very sound advice for ANY FI car with the in-tank pump.

I do have one question for those who had failures under $100K.  Do you add fuel injector cleaner to your tank alot?  Also, how much do you use?  One very common pump killer is these cleaners used improperly.  It the bottle says it will treat 25 gallons, don't add 2 bottles for "extra" cleaning.  Also, don't use them too often.  Every 5K miles between use is all you need to do.  What happens is the chemicals in the cleaners will destroy the pump if used in excess.  There are plastic parts in the pump, and these chemicals will dissolve it in high concentrations.

Also, that "filter" mounted to the pump is nothing but a debris guard that should last the life of the pump, as long as no one put too much dirt or crap into the system.  At least GM gives us the ability to easily replace the fuel filter by mounting it on the frame, unlike Dodge that DOES have the filter in the tank, requiring one to drop it for replacement.

PS: 2003, 94K miles, no problems.
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« Reply #86 on: 02/13/09 03:01 PM »

lol, my first factory  pump , that lasted the longest, I treated like an unwanted step brother!  I ran it out 29-30 gallons all the time. Heck I even made my own fuel treatment for a year and it took it. Every time I have pulled a pump out, the tank was clean inside. No Derbies in the filter pads. Even when I change the real filter it has never been clogged or pore out crap.

2nd pump I treated like my wife. It craped out around 12k.   Add dumb azz cracks below

3rd.....whatever

4th...... We will see


I don't buy the exposed pump part. Only if you run out of fuel. Its in a bucket and draws fuel into it covering its self before pumping it out. Still, I guess it's better to be cautious but what ever.
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First you'll lose your mind
and then any free cash laying around
Then mods will bloat your credit limits
You'll be like a crack addict, refinancing your home..
You'll cry yourself to sleep,stuff like, must get new rims.
Important questions like, polished or chrome. will shadow you daily


I'm Jon, and my Wife is an Avalanche widow..
Nationals 2007 and 2008 good times

http://alaskaav.mybru
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« Reply #87 on: 02/13/09 06:42 PM »

Don't really want to completely jinx this...but almost 55k, 2004 Z71 and no problems (insane amount of warranty work done before I got it at 32k...none having to do with the fuel system, but maybe why I've not had any others.

Really not thrilled about the lack of a replaceable filter. Goes against a big part of what I know to be good fuel system longevity. Beating
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« Reply #88 on: 02/15/09 11:14 AM »

Hi all,
I am new to the  thread/club. I own an 02 Z71 that I love/hate. It runs great except for the unknown lifespan of the fuel pump. I have owned it for 3 years (bought used at 85k mi) been through 4 pumps. about one every 10 k. I recently purchased gap insurance and began searching for the highest cliff, I have always kept 1/2 tank of gas, new filter and learned the "lucky chant" (didn't work). then I stumbled on the thread that discusses the modification, or hatch behind drivers seat. I think this is the solution I am looking for. If anyone has pix of this modification I would greatly appreciate a look before I begin cutting.
Brett
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« Reply #89 on: 02/15/09 02:24 PM »

Here ya go.

There is another thread somewhere with the exact dimensions of the hole. I can't find it right now. Do a search for "Fuel pump" as a topic and you can probably find it.
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« Reply #90 on: 02/15/09 02:38 PM »

2002 AV Z71 Fuel Pump went bad on 2/12/2008 at 175K miles.
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« Reply #91 on: 02/15/09 03:21 PM »

Thanks, found the modification pictures. Does the tank have to be removed to cut hole? or is there enough room to cut with out damage.
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« Reply #92 on: 02/15/09 03:27 PM »

The tank does not have to be removed. From what I have read there is plenty of room as long as you don't cut the hole too deep with the cutting wheel.
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« Reply #93 on: 03/01/09 10:32 PM »

Yep, 1100 bucks later  Sad I had a new fuel pump, fuel filter and a life time warrantee, woohoo!  and at 68k miles! on my 2002, 1500.
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« Reply #94 on: 03/02/09 03:07 PM »

I don't need a fuel pump yet but my fuel level sensor is gone .  its a 2007 with 57000 miles on it.   just like to get an idea on my next move .  the tank has to come down to put in the new sensor,  while its down im thinking why not put in new fuel pump and not have to worry about it.    now the fuel pumps covered under the warranty but the sensor's not go figure
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« Reply #95 on: 03/02/09 03:29 PM »

I don't need a fuel pump yet but my fuel level sensor is gone .  its a 2007 with 57000 miles on it.   just like to get an idea on my next move .  the tank has to come down to put in the new sensor,  while its down im thinking why not put in new fuel pump and not have to worry about it.    now the fuel pumps covered under the warranty but the sensor's not go figure

Some members here have solved this problem by adding fuel injector cleaner to the fuel. Sometime there is some kind of build up on the fuel level sensor that the fuel injector cleaner seems to dissolve.
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« Reply #96 on: 03/02/09 04:31 PM »

Yeah i tired the fuel cleaner tried it for two months it would work for a minute then stop and the reading was never right it was all over the place
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« Reply #97 on: 03/02/09 07:27 PM »

Fuel pump went out completely at 99,000 miles!
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« Reply #98 on: 03/02/09 07:29 PM »

My fuel pump went out completely at 99,000 miles on an 03' 1500 NFE. Thumbs down
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« Reply #99 on: 03/11/09 09:22 AM »

2003 WBH
2nd Fuel Pump: 30 mths
3rd Fuel Pump: 60 mths   

Since the 1st one went under the overall new truck warranty, the new pump was only covered for 12mo/12K. 
Are the AC/Delco fuel pumps for our Avalanche/Suburban/EXT just crap or what?  30 mth life span?

Will update mileage soon.

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« Reply #100 on: 03/11/09 09:43 AM »

04 Z71 with 127 000 km no fuel pump issues.
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« Reply #101 on: 03/11/09 11:28 AM »

05 av z71 128000 miles not a problem -  Knock on wood
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« Reply #102 on: 03/12/09 09:05 AM »

2002 Z66, original Delco died at 103k miles. Replaced with a Carter clone.
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« Reply #103 on: 03/17/09 04:40 AM »

 chevy  2003 Avalanche 1500 5.3L , 82,500 miles.  Replaced fuel filter and still did not stay running.  Could hear pump laboring to supply fuel.  Replaced pump with an Airtex pump from Auto Zone ($245).  It took me about 5 hours to do myself, not to difficult to do. Trying my luck with this aftermarket pump since the dealer wanted $522 for a GM original replacement pump (part # 25345024) and money is tight right now! So far so good!

Recommend replacing filter according to maintenance schedule, don't wait, you may be replacing pump like I had to! chevy
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« Reply #104 on: 03/17/09 04:46 AM »

2002 1500 NFE, just over 100k fuel pump died  Beating
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« Reply #105 on: 03/25/09 10:23 AM »

2004 1500 avy.
 fuel pump replaced at 77500 miles.
 
 I am also having the vent valve replaced for the 3rd time since 05. I called gm hq to let them know about it,I know from this site that I am not the only one having this issue so I urge anyone who has a re-occuring issue with the vent valve to call gm hq,not your local garage,if they know this is an issue they may do a recall. I currently have a case with them with this issue.
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« Reply #106 on: 03/25/09 04:00 PM »

03, 2500 ,  one failed at 81000 miles next one at 85000 miles 10 months later
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« Reply #107 on: 04/21/09 08:37 PM »

Tell me something guys? Are you guys saying this is a normal thing with the 2002/2003 Ava's?

I have a 2002 Z66 and 65000 kilometers on the clock and I just had to change my fuel pump for the third time.  banghead

I have never heared of this happening with other vehicles before. Isn't this to be considered as a fault in the design of the truck?

After my first fuel pump replacement the dealer had suggested not to let the fuel tank go down below 1/4 tank, which I ensured did not happen. This did NOT work. I am very disappointed as I love my 02 Ava but I cannot believe that this is to be considered as the norm.

What say you?
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« Reply #108 on: 04/21/09 08:43 PM »

That does seem strange for the pump it go out that much, since you have a 02 are you changing your fuel filter on schedule
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« Reply #109 on: 04/21/09 09:00 PM »

wow you got me beat!
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First you'll lose your mind
and then any free cash laying around
Then mods will bloat your credit limits
You'll be like a crack addict, refinancing your home..
You'll cry yourself to sleep,stuff like, must get new rims.
Important questions like, polished or chrome. will shadow you daily


I'm Jon, and my Wife is an Avalanche widow..
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« Reply #110 on: 04/22/09 07:00 PM »

I was having a few issues with my av yesterday. It started displaying 3 warning lights (stability, traction control & check engine).  Plus I had issues starting it each time and transmission shifting issues. All in the same day. I took it to the dealer today and they replaced the fuel pump. All the issues are gone now.

2007 -  38,500 miles, covered under warranty




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« Reply #111 on: 04/23/09 06:18 AM »

03 WBH, 130,000 miles, same fuel pump.  will go out tonight.
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« Reply #112 on: 04/23/09 09:24 PM »

Hi MichiganSilver03, I try to take it in for servicing when I see the change engine oil indicator come on. There have been times where I have taken about three weeks before taking it in for servicing.

Do you think that could have caused my experience?

 
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« Reply #113 on: 05/03/09 12:07 PM »

2002 Z71 91000 miles pump died about a block away from my house
replaced with ac delco no problems since
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« Reply #114 on: 05/13/09 09:07 AM »

2007 - purchased Oct 07, replacing fuel pump today under warranty - 29K miles
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« Reply #115 on: 06/01/09 02:28 PM »

07 Av with 33,400 miles fuel pump is being replaced, long crank to get started
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« Reply #116 on: 06/01/09 05:05 PM »

2002 1500 w/ 87K, went out this past weekend.

Dealer will be changing out filter and fuel pump today. They offered a fuel system flush for $260, can anyone supply insight to if this is needed?

 Help me!
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« Reply #117 on: 08/01/09 11:22 PM »

2003 1500, 111000 miles, replaced this week, $1200 frickin dollars!!!!  Holy CRAP!
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« Reply #118 on: 08/01/09 11:30 PM »

That sucks!
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First you'll lose your mind
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You'll be like a crack addict, refinancing your home..
You'll cry yourself to sleep,stuff like, must get new rims.
Important questions like, polished or chrome. will shadow you daily


I'm Jon, and my Wife is an Avalanche widow..
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« Reply #119 on: 08/02/09 08:31 AM »

2002 -106000 i was having trouble since 99000 miles with restarts -run into a store come out a few minutes later and would not start right away,i new the fuel pump was running with minimum pressure but i wasn't mentally ready to replace the pump.After alot of research in the forums "here"i ordered the pump from GLOBAL on ebay-85.00 plus shipping 105.00 total.I decided to cut a hole in the floor, with the aid of a copy of the picture someone had posted here--i got out my trusty dremmel tool. It took me about 2 hours to do the job most of the time was taken cutting the floor "i don't like treating my baby like that".The outcome was great the truck runs perfect and starts right up.THANKS to CHEVY AVALANCHE FAN CLUB members, all the  posts over the years have made repairing and modding my truck a hell of alot easier.
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« Reply #120 on: 08/02/09 11:38 AM »

thats Cool!
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You'll be like a crack addict, refinancing your home..
You'll cry yourself to sleep,stuff like, must get new rims.
Important questions like, polished or chrome. will shadow you daily


I'm Jon, and my Wife is an Avalanche widow..
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« Reply #121 on: 08/03/09 10:59 AM »

2003 1500, 111000 miles, replaced this week, $1200 frickin dollars!!!!  Holy CRAP!

$1200 is robbery. $300 OEM part (you can get Carter pumps for $100 on Ebay all day) and $900 labor and tax? barf
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« Reply #122 on: 08/04/09 07:34 AM »

Does anyone have a picture of this "hole in the floor" ?  I am interested to see where it is and how big it is.  I replaced mine by dropping the tank, but if there is an easier way to do it, I would like to see it in case the pump goes out again.  Thanks! 
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« Reply #123 on: 08/04/09 07:40 AM »

Does anyone have a picture of this "hole in the floor" ?  I am interested to see where it is and how big it is.  I replaced mine by dropping the tank, but if there is an easier way to do it, I would like to see it in case the pump goes out again.  Thanks!

Link
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« Reply #124 on: 08/04/09 06:38 PM »

I wish I had  cleaned up a bit before posting that pic...... viewed 840 times
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First you'll lose your mind
and then any free cash laying around
Then mods will bloat your credit limits
You'll be like a crack addict, refinancing your home..
You'll cry yourself to sleep,stuff like, must get new rims.
Important questions like, polished or chrome. will shadow you daily


I'm Jon, and my Wife is an Avalanche widow..
Nationals 2007 and 2008 good times

http://alaskaav.mybru
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« Reply #125 on: 08/07/09 11:23 AM »

Someone may have covered this already (didn't want to read every post) but I see fuel pump failures all the time. Almost all due to overheating. Pumps in the tank are only kept cool by the gass in the tank so as a rule of thumb you should always keep ur fuel at a minimum above a 1/4 tank to allow some fuel to always be in there to cool off the pump! If you let it get lower than that a lot you will have a pump failure! Just FYI guys!
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« Reply #126 on: 11/23/09 09:26 PM »

Run my down to E all of the time..  Lasted 7.5 years and 143,000 miles in AZ..  Not sure I buy the whole over heating thing.  Now I have something to do this weekend instead of relax.
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« Reply #127 on: 11/24/09 06:38 AM »

2002 avy no problems on the fuel pump untill 150k.
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« Reply #128 on: 11/24/09 07:17 AM »

Mine finally went at 68000 did the floor mod .  will never take it to the stealer for a fuel pump ever.
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« Reply #129 on: 12/01/09 06:29 PM »

My pump decided to go out while driving 70 on the freeway today. Starved the engine and killed it along with power steering and brakes. Scary... 186k miles not bad...

Had it towed to dealer after replacing fuel filter on side of highway as that's what I thought it was. Dealer wants 900 to replace. Another one for me in the driveway.
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« Reply #130 on: 12/03/09 04:50 PM »

Well after a $125 tow to dealer and $96 diagnostic fee I'm just going to let the dealership take care of this one. Lifetime warranty on parts and install. Came down on price to about $800. Does this sound about right? 4 hours of labor at 96/hr. How long does the job take I dont want them charging me 4 and it only takes 3.
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« Reply #131 on: 01/13/10 12:45 PM »

'02 Avalanche, 140k miles, just replaced fuel pump to the tune of $800 which included the flex pipe to hard lines and new fuel filter.  I cannot believe mine was from over heating as it was 8 degrees when it failed.  It was a long cold wait for the tow truck.
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« Reply #132 on: 01/13/10 12:54 PM »

03 5.3 liter died at 89400.  cost $430 with the tow to replace with lifetime waranty pump
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« Reply #133 on: 01/20/10 10:41 AM »

I must have the record on fuel pump life. Mine lasted for 250K miles on my '02. Just replaced it last week.
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« Reply #134 on: 01/29/10 06:35 PM »

'03 with 77,000 miles. Pumps runs some of the time. Dealer wanted $899 to replace. I am going to do it myself.
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« Reply #135 on: 02/09/10 02:58 PM »

Just happened last weekend while doing 60mph on the highway. Checked fuse + relay, no dice.

2002 AV 1500  fuel pump died at 8,200 miles... just ordered a Delphi replacement.  Those are actual miles. It's a 'grandpa' story.
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« Reply #136 on: 02/09/10 04:02 PM »

Just happened last weekend while doing 60mph on the highway. Checked fuse + relay, no dice.

2002 AV 1500  fuel pump died at 8,200 miles... just ordered a Delphi replacement.  Those are actual miles. It's a 'grandpa' story.
Only   Shocked 8 .2K Miles and the fuel pump went kaput  Huh
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« Reply #137 on: 02/16/10 04:53 PM »

Only   Shocked 8 .2K Miles and the fuel pump went kaput  Huh

Yup. 8,200 miles and 7 years of (mostly) sitting in the NM desert...wonder if that has any negative effects.

I dropped in the new Delphi pump last weekend ($230) and she fired right up. Tested the original with a multimeter, straight up SHORTED. Should have seen it coming. With the key in the 'accessory' position the old one would stay on for > 10 seconds to pressurize the lines...the new one is <1 sec.
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« Reply #138 on: 03/03/10 08:13 PM »

2004 AV  with 145,000 miles     fuel pump just went 2 days ago   and NOW  I have Tranny codes!!!!!! Shocked
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« Reply #139 on: 03/04/10 09:43 AM »

 I am pretty new to this forum!!!
I have an 04 AV  Z71 w/ 143,000  and this truck has been nothing but AWESOME !!!!!! but when it rains it pours.....  Last wweek I got Tranny codes and then a few days ago, I left the truck running got out to go grab the mail and when i went to get in it , it was off!  I tried to start it again and it jumped like the flywheel got jammed on the starter. So i rooled it into my parking spot and tried to start it again and this time it just cranked but wouldn't start !! I went into my house and came out about ten min  later and the when i went to start it the starter / ign  stayed engaged for about 2 or 3 seconds! I waited a min and tried it again and PRESTO it fired right up!   I tried it several times during the day and each time it started right up but when I went to leave for work at 4:30 am (and it was SNOWING) it just cranked!!!!!!  I am not sure what to do about it but I would really like to change this pump myself but I am having trouble getting the picture of the cut out of the seat panel ???I thought about bringing it to the local shop , they said it would be about 800 bucks for the job (i think that included the pump). Any suggestions or help would be graetly appreciated .

Thanks guys   
Bye the way this is a really cool site and I am pretty glad i stumbled upon it
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« Reply #140 on: 03/04/10 06:08 PM »

2002 Z71  Pump went at 218K (kms)

Wish I had nutted up and done the floor cut fuel pump mod...  Cost 1300bucks at my garage    Roll Eyes
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« Reply #141 on: 03/05/10 04:05 PM »

2002 Av 5.3L 4wd Z71 Fuel Pump replaced in Feb 2010 @104,000 miles.
Put a Delphi unit.
Now it runs like brand new.
Original pump was running for a while with only 30psi.
Car is in Cabo area and I had driven it from Minnesota 3,000plus miles to get there.
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« Reply #142 on: 04/07/10 06:46 AM »

i have read a few different pressure readings for the pumps, my started making a loud whinning noise yesterday, doesnt drive any different yet, but it was louder than normal.  It started making the noise this morning again and i drove it about 20 miles and before i shut it off it had quite making the loud whine and was its normal low hum again.  I dont want it to go out on me while driving because i drive 200 miles everyday to work So i thought i might check the fuel pressure if it makes the lound whine again.  It sounds like from what i have read it should be right at or around 55psi, is this correct?   And if so is that with the engine running or just the ignition on?
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« Reply #143 on: 04/07/10 11:09 AM »

I think 50-55 is good aslong as it is steady when running. a little up or down when gassed is probly ok but if the needle on the guage is spastic...bad

I usualy install the guage with car off then watch as it is put in start, it should prime to full pressure.

Then watch it running.

then shut of AV and check the pressure for a few hours to see if it bleads off...
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« Reply #144 on: 04/10/10 09:27 AM »

died at 100,000 miles
2003 avy
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« Reply #145 on: 07/14/10 09:26 AM »

Mine died at 63,500 changing it today. 2003 Z-71
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« Reply #146 on: 07/15/10 04:36 PM »

07 Avalanche 1500 LS. Fuel pump replaced at 70,200 miles.
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« Reply #147 on: 07/16/10 10:49 AM »

2004 78,000  and a 8.1 liter and NO ISSUES - knok on wood
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« Reply #148 on: 07/28/10 03:50 PM »

07 LTZ with 77k. Just yesterday it started acting up. Slow to start but runs great once running. Suspect fuel is on its way to the grave.
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« Reply #149 on: 08/10/10 08:49 AM »

2002 Av 2500 8.1-l - no problems at 92000 miles

2007 Av 5.3-l 2LT - fuel pump replaced at 32000 miles
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« Reply #150 on: 08/15/10 07:34 PM »

Started acting up a month ago, Getting harder and harder to start.  Ordered a AC Delco replacement from The Parts Bin for $348.00.  Took me 6 hours by myself to change it out.  I went ahead and dropped the tank. 
86,000 on a 2005 Avy.  So far so good. 
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« Reply #151 on: 08/15/10 07:49 PM »

Hard starting is a sign, but you dropped the tank and you are in Louisiana I bet you lost 5 pounds in sweat.
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« Reply #152 on: 08/16/10 07:15 PM »

More like 10 pounds
Hard starting is a sign, but you dropped the tank and you are in Louisiana I bet you lost 5 pounds in sweat.

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« Reply #153 on: 08/16/10 07:17 PM »

More like 10 pounds

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« Reply #154 on: 08/22/10 09:49 PM »

Started having fuel pressure regulator problems on 2004 at 81K miles. Will be replacing the entire fuel pump assembly within next 30 days. Trying to decide whether to drop the tank or cut a hole in the floor.
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« Reply #155 on: 08/22/10 10:09 PM »

Mine went last Monday at 5:15 PM in 4 lanes of stop and go traffic on Hyw 101. 162,500 original pump. Luckily I had already picked up an 255gph pump to upgrade and replace the stock one.. I did the access hole method for the change out..

Randy
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« Reply #156 on: 08/23/10 06:16 AM »

Mine went out 2 weeks ago. Fuel gauge was the first to go. I was going on vacation so I was gonna leave it at work to get fixed while I was gone. A few days later the pump failed. NO NO it had fuel I just put some in. I was in the center lane of a 6 lane intersection on the 2nd busiest intersection in town with an oversize load right behind me. Lucky for me a friends wrecker was round the corner to get me towed in.

Anyway 91000 miles first pump.
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« Reply #157 on: 08/26/10 03:05 PM »

Cut hole in the floor--too less than one hour. Hardest part was getting the retaining ring off. Ordered a new pump (delco) for will replace in tomorrow. Chevy dealership quoted me $1000. Easiest $1000 I ever made.
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« Reply #158 on: 08/26/10 03:29 PM »

Mine went out yesterday, 03 with 97,200 on  the  clicker.  Replaced with a Federal Mogul pump from Pep Boys, 260 and change, cut the hole  in  the  floor board for access.  Runnin like new again.

Didit
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« Reply #159 on: 08/27/10 10:49 AM »

well i have a 2007 37,800 and it was getting harder to start lately so i will be getting a new pump & level sensor...good news my  ex-girl who works at chevy is getting me the pump for 225 and the sensor for 80..and my buddy has a auto body shop he's doing the labor i'll throw him a 100.00 but pissed it went this truck is nothing but pampered...
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« Reply #160 on: 08/27/10 11:16 AM »

.... getting harder to start lately ...

SO that is making you replace pump?

You should properly trouble shoot as it could be something else and that could be something that costs little to nothing
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« Reply #161 on: 09/20/10 07:05 AM »

2003 with 123000 went on 9/18/10  Angry
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« Reply #162 on: 09/20/10 06:01 PM »

2004 W/166K still has the factory pump. When it goes I WILL NOT be cutting a hole in the floor  Tongue
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« Reply #163 on: 10/05/10 06:36 PM »

 Just replaced at dealer
2007 w/ 54,000 miles
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« Reply #164 on: 10/05/10 07:54 PM »

I notice several 07 owners had this problem don't know why.
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« Reply #165 on: 10/06/10 11:38 AM »

The wifes truck died and everything met my expectation for a pump replacement but I discovered the ignition 1 relays socket under the hood is bad. You can wigle it and it will come to life or die.... It's choise ... Ugg. 
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Important questions like, polished or chrome. will shadow you daily


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« Reply #166 on: 10/06/10 12:35 PM »

Just over 105k on my '03 AVY it seem there is no rime or reason for them to go out.
A local shop I use some times told me when my daughters fuel pump went out on
her 87 Merc  barf  that he will not use after market pumps OME only. Said it is a 50/50 crap shoot if they
fail. I went with a NAPA life time pump. Drove it for a day seemed good filled the tank so she could drive back to school. She drove it the next morning and later in the day made it about 5 miles on her way back to school.
Now I have a dead car with a full tank of gas Swearing. I was ready to put a match to it , but she needed it for school.
Not looking forward to dealing with the full tank. Lucky day a friend of a friend did it for $100. The brush wires had came out.
Had F@@@ OME pump flown in, an extra $60, sold the car, still running around town.
So after my rants how have the after market fuel pumps held up?
May be a new poll?
JV
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« Reply #167 on: 10/07/10 10:38 AM »

2007,     65,100 miles

Would try to start, and it wouldn't. After 3 tries it finally started. This happened to me 4 times over 2 days. I took it to the dealer, and guess what, as usual, it starts right up. They can't replicate the problem, and tell me everything checks out. banghead  The tech goes to start it to bring it around to me, and thank god....it doesn't start. So, another 45 minutes of diagnosis and codes tells them it's a bad fuel pump. I bought the extended warranty, so it was covered.

All of this while in the middle of driving 2,500 miles for a week long vacation. We were 500 miles into the trip when it happened.
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« Reply #168 on: 10/08/10 05:16 PM »

Can you add to or modify an existing poll.
Who installed after market pumps___
Problems
Yes____ 
how many miles from install___
No___
how many miles from install___

Who installed OME___
Problems
Yes___
how many miles from install___
No___
how many miles from install___
For the poll to work on mileage would It have to some thing like this
how many miles from install
5K+
20K+, ext
OR
0 TO 20K
20 TO 40K
40 TO 80K
80 TO 100K
100K+

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« Reply #169 on: 10/12/10 12:13 PM »

2002 Z66  died at the gas pump after filling up....  155216 on the dash! 

I feel the mod coming on... lol
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« Reply #170 on: 11/11/10 02:32 PM »

Mine is dead Cry full tank!! I cut the hole and waiting for the pump Beating
2002 1500 Z71, 172,000 miles chevy
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« Reply #171 on: 11/20/10 01:47 PM »

2002, 107k, truck was giving me trouble starting.  Hole in the floor works great, Wisconsin rust sucks trying to get the fuel lines off and the retaining ring.  But after a couple hours it works good.
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« Reply #172 on: 11/20/10 02:50 PM »

My 05 has 93k on it and for the past 2 years I have to cycle the key to start it.. I would rather spend the money on a mod you can see. But I'm sure one day its not going to start.   Maybe someone that has changed there pump could send me the old one so I can change the regulator. Lol. My pump checked out fine the fuel drains back in the tank.
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« Reply #173 on: 12/02/10 10:20 AM »

Hello all, My 03 2500 just lost fuel psi today , it has 98k , I was driving and the truck just started to sputter and then shut off after 10 Min's I was able to restart but with only 20psig ( I have a fuel gage on the pillar and one on the rail) I hate to admit it but  have never replaced the fuel filter !!!! So i towed it home and replaced it fuel psi came back for a moment but went away again. I have read this great info that is posted and I am ready to cut the floor   BUT.... I could use some more INFO and HELP...... Normal PSIG is 50psig to 60psig

1) How may fuel tanks are there in the 03 2500?
2) Can I replace the fuel pump the same way as the 1500 AVA?
3) Is there 2 pumps in the 2500? ( read some were there,s one on top of the spare)
4) I found what I think is the fuel pump relay but can not find the fuse, can some one point me in the right direction?
5) If there is two tanks & 2 pumps do the share the same relay?
6) How dose fuel get from one tank to the other when filling up?
7) I could use all the help I can get ...... THANKS

jonesm4@msn.com or 908-247-4564  ICON MIKE
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« Reply #174 on: 12/02/10 09:37 PM »

Hi Mike, I finally figured how to put a picture on here of what "not" to do. I used the 1500 AV method and it's all wrong for the 2500. I think I will just have to go back 3-4 more inches, But I'm not sure if I will have to widen the opening. I would hate to have to cut into the brace. I will update this tomorrow.  Right after I cut this hole I found a new post by Dae Ma (right after my post) in the Maintenance and Care-How to change a fuel pump. I wish I would have read that before I cut, but I can weld the 2 pieces I "will" have, back together and still have a usable access.
I don't exactly know how to get these lines off (never seen this type) any suggestions?
Which lines are which (the one going to the front is the feed) but what are the other two?

It's an 2002 2500 with 130,000 miles on it and I let the fuel filter go too long. What was I thinking!!?   
« Last Edit: 12/02/10 10:06 PM by 02Tom » Logged
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« Reply #175 on: 12/02/10 10:33 PM »

get something like this

http://cgi.ebay.com/ebaymotors/Air-Conditioning-Fuel-Line-Disconnect-Tools-OTC-4495-_W0QQcmdZViewItemQQhashZitem255f3db8e4QQitemZ160511670500QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

I got mine at sears under 10 bucks,   twist in to the tank side of the connector and it will open the connection to come off

id guess one is the pump pressure line, then return or vent   then the line to the rear tank is the one heading backward

you can mark them with colored electrical tape, one red, one yellow, one blue. or numbers on package tape...

good luck



Hi Mike, I finally figured how to put a picture on here of what "not" to do. I used the 1500 AV method and it's all wrong for the 2500. I think I will just have to go back 3-4 more inches, But I'm not sure if I will have to widen the opening. I would hate to have to cut into the brace. I will update this tomorrow.  Right after I cut this hole I found a new post by Dae Ma (right after my post) in the Maintenance and Care-How to change a fuel pump. I wish I would have read that before I cut, but I can weld the 2 pieces I "will" have, back together and still have a usable access.
I don't exactly know how to get these lines off (never seen this type) any suggestions?
Which lines are which (the one going to the front is the feed) but what are the other two?

It's an 2002 2500 with 130,000 miles on it and I let the fuel filter go too long. What was I thinking!!?   
« Last Edit: 12/02/10 10:48 PM by Alaska_AV. » Logged

First you'll lose your mind
and then any free cash laying around
Then mods will bloat your credit limits
You'll be like a crack addict, refinancing your home..
You'll cry yourself to sleep,stuff like, must get new rims.
Important questions like, polished or chrome. will shadow you daily


I'm Jon, and my Wife is an Avalanche widow..
Nationals 2007 and 2008 good times

http://alaskaav.mybru
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« Reply #176 on: 12/03/10 10:03 PM »

  I realized I posted this in the wrong thread, sorry. ICONMIKE there's more info here http://www.chevyavalanchefanclub.com/cafcna/index.php/topic,100699.msg1881979.html#msg1881979

  This was the final cut on the 2500, the rebuild went smooth, as did the reinstall. Thanks all for the help.

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« Reply #177 on: 12/09/10 09:49 PM »

Cut the hole on the floor tonight to replace it tomorrow night.  Went perfectly so far.  '02 with 144k.
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« Reply #178 on: 12/23/10 05:45 PM »

rather than start a new thread....

i am replacing the fuel pump in my 04 this week. mine did not quit, but instead the tubing had corroded to the point of leaking. i chose to cut the hole as well. Because the top of the tank was for sure covered with gasoline, i cut the hole with an air chisel to prevent sparks. since i have an extra vehicle, i haven't ordered the new pump yet, which leads me to my question.

the best price i can get from the stealership is $709 CDN. other part stores sell between $650 and $1100. after searching the net most of the evening, i found on amazon.com a bosch pump for $221 USD. i live along the US border, so picking it up on the US side is no problem. before i order it, i want to ask if anyone has used this pump? i don't want to go cheap, then have to spend more to replace it later with something else. can i trust this bosch pump?

linky
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« Reply #179 on: 12/23/10 06:37 PM »

2002 1500 Z71...122K+...fuel pump started sputtering for about 2 weeks off and on, then crapped out altogether.  Replacing with 2 Walbro 255lph pumps!  YEAH BABY! IT'S GOT A STROKER!
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« Reply #180 on: 12/23/10 09:01 PM »

Here's a post I did earlyer today that might help also... The 2500 is definitely differant from the 1500 so DO NOT use the measurements from a 1500 AV post... My recommendation is to measure your own AV to be sure.. But the 2500 sits back farther so you need to remove the rear seat to do it correctly. Still easier than dropping the tank and also make future changes quick and easy...

Randy

http://www.chevyavalanchefanclub.com/cafcna/index.php/topic,124430.25.html


In the future for AV 2500 owners who want to do the fuel pump access panel mod here are a few tips to make it a little easier..

1. Remove the back seat and roll back the carpet and pad.

2. Reach up between the frame and floor pan and using a tape measure and locate the approximate center of the pump housing.

3. Transfer the measurement to the inside floor and drill a 1” hole in the floor pan with a hole saw.

4. Layout an access hole approximately 5” x 7” (It does not need to be very large).

5. Using the 1” hole saw drill the four corners of the access hole you laid out and then using sheet metal snips or jigsaw connect the four holes.. Be careful the fuel line and wiring are about 2 to 3 inches below that is why I only used sheet metal snips..

6. Take a water hose and wash off the top of the tank and housing to remove any road debris and then blow it off with air to dry.

7. R & R fuel pump…. You will need fuel line disconnect tools or a small flat blade screwdriver and patience… Good time to upgrade, I installed a 255lph Walbro.

8. Fabricate new access cover out of sheet metal or do what I did and find an AV at the junk yard and cut out a large piece of the floor pan above the pump to be trimmed to fit and will match the floor contour perfectly. (Find this part before you need to change your fuel pump as I did)

9. Put down sound deadener. (Good time to do so but optional)

10. Roll back the carpet and pad, reinstall the back seat.

11. Cut two slits in the carpet and pad above the access panel from the back to the front for future access to the panel.

Now if you ever need to replace the fuel pump again it will be a 30 minute job and no need to drop the tank… Because of this forum I knew my pump would go sooner or later so I had all the parts and pieces before mine went out so I was only down a few days.. By the way mine went at 162,000 miles and I always filled up when I was on dead empty, so I don’t give any credit to some who think that causes fuel pumps to fail early or prematurely…
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« Reply #181 on: 01/03/11 06:36 PM »

!st Pump 112000 in Council Bluffs, IA during the College World Series across the river in Omaha. I died on the 29/80 interchange around 7pm.... Not a single hotel had a room. I replaced it the next day in a yard just south on 29. I then continued my cross-country trip heading north and the new pump died near Sheldon, IA. Again towed to a shop in Spencer, IA. I guess I cant complain too much. I did get a Delco pump for about $350, Free towing, and free use of any tools in both shops. I forgot to mention that my dad works for the Spencer shop. But the guys and gal in Council Bluffs and the guys in Spencer all went well out of their way to help me out. Thanks Vander Haag's Used Trucks in both places. Since I went with the Delco pump, not a single problem.
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« Reply #182 on: 01/05/11 11:31 PM »

Mine went out @ 157,600 miles.
2003 4x2 Z66.
Order a Delphi pump.
Awaiting it's arrival...

 Wave Thumbs up!

BTW, I dropped the tank. Wasn't bad at all..  Cool!
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« Reply #183 on: 01/07/11 11:27 AM »

Dropping isn't the bad part..... But wrestling a 1/2 full tank back in there.... Big laughter with tears I did it twice, second time was a little easier but it still sucked.... Good Luck, its a fun task....
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« Reply #184 on: 01/18/11 01:55 AM »

Dropping isn't the bad part..... But wrestling a 1/2 full tank back in there.... Big laughter with tears I did it twice, second time was a little easier but it still sucked.... Good Luck, its a fun task....

Re-installation was a breeze!

My Chevy, takes a licking, but it keeps on ticking!
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« Reply #185 on: 03/24/11 01:02 PM »

Mine just died today. My 2002 1500 with 122k miles. It's never a good time to spend that kind money  I need a hug
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« Reply #186 on: 03/24/11 01:05 PM »

2005 1500. Had the fuel pump replaced under my extended warranty at about 79,000 miles. It wasnt holding pressure after it was shutoff so the truck would take longer to start.
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« Reply #187 on: 03/26/11 09:20 AM »

02 Z71 changed the fuel pump last week with 90k miles.
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« Reply #188 on: 05/17/11 04:58 AM »

2002 Z66

107000K miles

had to replace fuel pump!! cool
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« Reply #189 on: 05/21/11 12:45 PM »

2003 Av went out at 98,000 miles.  It went out in Miles City, MT., about halfway between where I had been on vacation and home.  It was on a Friday evening, with the wife, kid, and 2 dogs, minus my toolbox for more room for luggage.  3 nights in the only motel that allowed pets, towing fees, and paying the only dealer for 100 miles for the standard "gold plated" GM fuel pump ended up tacking 3 days and $1800 onto my vacation.  Oh, yeah, it was intermittent to start off with, so we left the dealership twice, only to get towed back in.  Wahoo!
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« Reply #190 on: 05/22/11 05:47 AM »

It sounds like a good time was had by all  Thumbs up!
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« Reply #191 on: 05/24/11 08:12 AM »

2003 - mine went out about 3 months ago - around 110k.
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« Reply #192 on: 06/12/11 03:39 PM »

2003 WBH 145000 miles on it did it on my June 5 in the my Redneck Bro-in-Laws place not as fun as I was hoping, but it safed me almost 300 in labor.  But still having Lugging issues when you come to stop.
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« Reply #193 on: 07/04/11 10:00 AM »

Fuel pump 97,000 on a 2003. banghead



I had a engine misfire on cyl 7 and 8 the shop found the fuel pressure was 5 pounds below factory specifications so they changed it.. I did ndew plugs and wires at the same time and guess what the the miss is still there  banghead banghead banghead
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« Reply #194 on: 08/17/11 05:28 PM »

2007 and it happened at 77,000 miles. Fuel pressure drops to 2 pounds when it sits, pumps back up to 62 while running, sits at 50 right after and then drops over a few minutes. Am putting a $7 BMW check valve in the fuel line rather than spending the $1,100 the dealership quoted me to drop the tank and replace the entire fuel pump unit.
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« Reply #195 on: 08/17/11 11:13 PM »

my did at 195k ... i aint complaining lol ... put the delpi pump in and with my lift wasnt so bad to drop the tank lol ...just make sure u do ur fuel filter as often as u can . it will really extend the  pump life ans so will allways keepn the tank over a 1/4 full and half full is better . keeps the pump cooler
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« Reply #196 on: 08/19/11 11:19 AM »

Mine died again  Thumbs down  this time at 267,077 kms.  Going to cut the floor for sure this time, and probably buy 2 pumps.  That way I can carry one around if this POS dies in another 50k. 

Are there any better alternatives?  Would there be any benefit to getting a high pressure pump, I know MS38w has his 2 Walbro 255's, but his setup is unique.  For a stock 5.3 or 6.0 would there be any advantages to a higher pressure fuel pump? 

If that's a no to the fancy pump, then from the general tone of this long thread I gather the AC Delco pumps seems the best still.  Right?
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« Reply #197 on: 08/29/11 04:44 PM »

OK, so I got the BMA part in the mail today -  $7 for the part and $20 postage LOL (BMA was really fast - postal not so much). Will be putting it in on Thursday. If it works and all goes well I will post pix this weekend showing where it is installed. If it doesn't work well then I guess I am out $27 and that's a pittance next to what it will cost to replace everything so keeping my fingers crossed!
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« Reply #198 on: 09/01/11 07:04 PM »

Sigh, got the BMA part, had a friend who is chief mechanic at a shop near me look at it and the fuel line and he says it is not the right fit but recommended not doing it anyway because some vehicles have issues with too much pressure remaining in the line... found a post here about blowing o-rings and injectors:

http://v70r.com/forums/topic/32025-external-fuel-line-check-valve-hard-starts/

I am just paranoid enough to worry about this happening so it will be a $7 part in a drawer and I guess I will go back to replacing the pump. At least it will allow me to clean out the tank and have a look at the filter. Going to go Delphi oem since I have read so many horror stories about aftermarket replacements. The saga continues....the repair expense mounts, sorry I could not contribute something more helpful to those of you going through the same thing. If anyone else pulls this off somehow though please post about it.

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« Reply #199 on: 09/01/11 09:02 PM »

Mine is a 2007 and fuel pump died at 28,000. miles.
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« Reply #200 on: 09/09/11 02:19 AM »

2002 1500, and mine took a crap at 100,500 miles.   Angry
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« Reply #201 on: 10/06/11 12:33 PM »

OK I think I'm going to be added to the list this weekend.

Question for anyone who has had one go out, did it start out as a hesitation
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« Reply #202 on: 10/06/11 09:56 PM »

OK I think I'm going to be added to the list this weekend.

Question for anyone who has had one go out, did it start out as a hesitation

I don't know about hesitation Byron but if you meant longer cranking at start that is what mine did. Normally it fires right away but when the fuel pump was giving out it took more cranking to get the engine to turn over. Most likely it would have started stalling or just up and died on me but I am kind of a fanatic about my vehicle and when something is not right I haul it to the Chevy Doctor. Sometimes it is over concern I am sure but not being a mechanic and liking to roam the country alone I want my truck in top shape. 
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« Reply #203 on: 10/07/11 12:41 AM »

Thanks Aussie, I was headed toward the xway ramp and got on it and everything went quiet, but it did not die. Guess I have to pull out the tool box this weekend.
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« Reply #204 on: 10/08/11 06:04 AM »

When mine went out, it would sputter from time to time or die right after it started.  It died once or twice as I pulled up to a stop light , then when it finally went, I was stranded at midnight, middle of downtown and about 15* outside...chilly night to be standing around.
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« Reply #205 on: 10/08/11 09:20 AM »

Well is was about 48 PSI and should be 55-62 PSI looks like it is dying.

Opps I forgot 2003 2500 and 105,000 miles
« Last Edit: 10/08/11 09:42 AM by MS03 2500 » Logged

2003 2500
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« Reply #206 on: 10/26/11 12:32 AM »

2002 with 108k. Went out like a light switch. No warning whatsoever. When I checked, the fuel filter clogged as well. Bought a delphi pump and fuel filter for $290.00 through a local parts guy. Finishing the work in my barn tonight.

While I have the tank removed I'm likely going to replace the EVAP selonoid. I have been getting a check engine light. Can't remember the code but I know it eluded to the selnoid being "open." Figured nows the time to do it.   Smiley

Wish me luck!!
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« Reply #207 on: 12/02/11 08:23 AM »

2007 at 66,000 mine ahot craps.
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« Reply #208 on: 12/06/11 07:35 AM »

Original pump 2002 w 186000, checked pressure last summer everything was to spec, hope this doesn't jinx it. Thumbs up!
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« Reply #209 on: 12/06/11 09:05 PM »

Original 210,000 on the way to the beach..   banghead banghead
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« Reply #210 on: 01/16/12 07:06 AM »

Just killed the pump 172,345 miles on the avy.  New Delphi pump, carquest filter, seafoam cleaner in the tank, new plugs and wires and she purrrrrrs.
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« Reply #211 on: 01/16/12 09:20 AM »

2004 Z-71 with 130,000 miles and no fuel pump issues.
2008 LTZ with 55,000 miles and no fuel pump issue - does like to use oil however.
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« Reply #212 on: 01/18/12 09:05 AM »

2002 SOM AV - 115,000, Fuel Pump is noisier at start up than it used to be. Has sputtered a couple times when trying to start, but runs fine. Also hve some issues with the fuel loading up and blowing out the exhaust. I think my pump or the pressure regulator is getting ready to take a crap. Anything I need to know before I drop the tank this weekend?
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« Reply #213 on: 01/18/12 09:57 AM »

2002 SOM AV - 115,000, Fuel Pump is noisier at start up than it used to be. Has sputtered a couple times when trying to start, but runs fine. Also hve some issues with the fuel loading up and blowing out the exhaust. I think my pump or the pressure regulator is getting ready to take a crap. Anything I need to know before I drop the tank this weekend?

Since you have a 2002, have you changed your fuel filter recently?
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« Reply #214 on: 01/20/12 09:24 AM »

Mine went out yesterday on my ’02 with 156k miles.  I had just dropped my wife’s car off to get some recalls done.  So she took our boys in the truck to run some errands, and it went out with no warning.  So they were stranded in the cold without heat, and I was at work without a vehicle to get to them.  Made for an exciting morning, but my dad was more than happy to come to the rescue and give his favorite grandsons and daughter-in-law a ride home.
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« Reply #215 on: 01/25/12 06:11 AM »

After reading this post I realized how lucky I've been to be at 190,000 with the original fuel pump. I do a lot of long distance towing and do no want to have a failure a long distance from home and be at the mercy of unknown mechanics. I bit the bullet yesterday and cut an access opening under the rear seat. I read a post on this and after double checking the location I cut a 9 inch by 9 inch opening and nailed it right on top of the pump. Total job including fabbing a cover plate took 3 hours. Of course this means I'll never have a fuel pump issue now that it's an easy job, but I feel a better.  Thumbs up!
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« Reply #216 on: 01/30/12 12:08 AM »

Just replaced fuel pump on 2002 2500 with 160,000 miles. Bought Delphi FG0275 via Amazon for $137. Not sure what pressure it should be but new pump reached 55PSI with key in run position prior to starting engine, Once started 46PSI. Hoping this is ok??? Anyone know what it should be at idle? I did not rplace filter yet...
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« Reply #217 on: 04/06/12 03:05 PM »

My vote on this poll (if I could change it) would change from no problems, to Yes.  The original pump on my '02 with 114k miles died on me during rush hour traffic two days ago; fortunately I was able to coast to a safe spot more-or-less out of the way and try to crank to no avail.  $1200 later and it's running again.  With all the stories I have read on here and the many '00-'03 Silverados, Tahoes, and Suburbans (haven't really seen any Avs though) with the 5.3L I have seen broken down with what I assume is the same problem most of the time, this did not surprise me (although there was no warning it would happen).  I'm just relieved it's over and I didn't hold up traffic.

As a sidenote, my family and I have had Chevy trucks ever since 1988, and this was the first time any of them had broken down.  Not to say they didn't have their problems but this was the first time any of them ever required a tow.  It was a nice run while it lasted Smiley.
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102,000+ miles of fun (Jan. '11)...One of the best looking '02's out there!
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« Reply #218 on: 10/29/12 07:39 AM »

2002 Z-66 208,000 miles original fuel pump failed last Sat. Fortunately was only one exit from Chevy dealer. Had cut an access panel last summer since I knew I was long overdue. Access panel saved me a couple hundred bucks. In talking to the people at the dealership found out they had a local customer who had just ordered a new Avy, his old ride is a 2002 Z-66 bought at their dealership and he has 550,000 miles on the clock. Not hard to understand why he bought another. First time my Avy has ever failed me.
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« Reply #219 on: 10/29/12 10:43 AM »

Mine just went this morning getting off the interstate.  Like others, no warning, just stopped running and wouldn't start.  Fortunately, I was able to coast to a gas station and get it mostly off the road.  2002 with 150,000 miles.  Roadside assist towed it 5 miles down the road to the dealership.  Without prompting they gave me the option to purchase my own pump for them to install, saving me over $250.  Picking it up this afternoon.  Still going to cost a pretty penny, though.  The pump I bought w/filter was $250, and the dealership quoted $425 for labor. banghead
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« Reply #220 on: 10/30/12 05:25 AM »

No problem 2002 84,000 miles
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« Reply #221 on: 10/30/12 06:06 AM »

Had I been closer to home I would have had it towed home and done the repair myself. Dealer charged me a total of $750.00 for the repair, $270.00 for labor the rest for parts. Again I had cut an access panel last summer so they didn't have to drop the tank. In driving the truck home I think there might have a been an indication earlier that the pump was going. The truck had had a very slight stumble off idle for a few months which is now gone. It was only noticable under very light acceleration.
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« Reply #222 on: 10/30/12 08:44 PM »

I guess I should buy a pump and be prepared. But at 145000 on my 2008 it hasn't failed yet. I only have 43 psi but I don't know what it should be.
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« Reply #223 on: 10/30/12 09:19 PM »

It should be over 50 LorensAV, mine is 48 with 118K and I keep a spare pump in  the back.
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« Reply #224 on: 10/31/12 08:49 AM »

My intent after I cut the access panel was to carry a replacement fuel pump, just never got around to buying it. I must admit other than the $750 price it was a fairly pain free experience. I have Hagerty insurance on my classic cars which also provides roadside assistance on all my vehicles. They did an excellent job of getting a good tow truck to me with a driver who was very careful with my Avalanche. Although I've owned GM vehicles for over 46 years I tend to avoid dealerships for repairs as I have had some bad experiences. Didn't have much choice with this one, but luckily I was 1 exit away from Hirlinger Chevrolet in West Harrison, Indiana, they really impressed me , thought the price was fair, they listened to me when I described how the Avy acted before it died, and even recommended an excellent local eatery and took me there. Price included a new pump retaining ring and wiring harness which definately need replaced, they also found an old recall that hadn't been done on my vehicle. The entire staff was so good that when I need my next vehicle I'm gonna drive the 2 hours and talk to them first. Thumbs up!
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« Reply #225 on: 10/31/12 03:34 PM »

It should be over 50 LorensAV, mine is 48 with 118K and I keep a spare pump in  the back.

Probably should change the fuel filter assuming the pressure reading is measured after the filter.

What do you guys recommend for a brand? If I do purchase one in anticipation I will not have a warranty if it fails after a year and i havent installed it yet. I travel a lot so I really don't want to be stuck anywhere or for that matter with a $750  bill when I am quite capable of doing this myself. The pump is $300  Shocked

Well I checked advanced auto and just the pump is 79 plus a 20% spooky sale today. So that makes me happy.
« Last Edit: 10/31/12 04:14 PM by LornesAV » Logged

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« Reply #226 on: 10/31/12 04:32 PM »

Check Rockauto they're around $230 for the entire module, I prefer to use something close to original for this rather than other brands. I'd buy Delphi or AC Delco
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« Reply #227 on: 10/31/12 04:38 PM »

Got my spare from amazon.com. it's AC Delco also.
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« Reply #228 on: 10/31/12 04:39 PM »

Advanced is AC Delco but just the pump, that should be easy enough to add to the existing assembly. Other than the fuel level sender what would be the benefit of getting the complete assembly?

Fuel level sending unit doesn't come with it any way, so I guess I'll save $130

Got it for 68.90, just pump no assembly.
« Last Edit: 10/31/12 08:01 PM by LornesAV » Logged

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« Reply #229 on: 11/01/12 04:46 AM »

In high milage situations I just prefer to replace the entire module, since I've had fuel level sensors fail also. I don't want to do the job in another 50,000 miles. In lower milage vehicles I don't see an issue with just replaceing the pump.
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« Reply #230 on: 11/05/12 09:41 AM »

2002 with 135k fuel pump died.

Cut the hole, replace with Delphi pump, put in new filter, cleaned throttle body and MAF, replaced air filter at same time.  Total time: just under 2 hours.   Thumbs up!

Runs great, and now I have access panel, but I hope it runs long enough I forget the panel is there... Tongue
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« Reply #231 on: 11/06/12 08:08 PM »

2004 Z71, 210000km(131000mi) in the shop right now. Fuel sending unit...that's all the details as to what has specifically failed so far.

Sending unit $600 CND...install $350. I took the bad unit with me and the leak was on the steel return line, right at the bend on the top of the unit. Quite often the pump goes...so if it does I will have a much cheaper fix....they oiled the top of the sending unit before putting the tank back up.
« Last Edit: 11/07/12 04:33 PM by 04Sunburstcanada » Logged

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« Reply #232 on: 01/28/13 09:10 PM »

2004 with 210000 km, sending unit was replaced because return line was rusted through and leaking at shut down. Pump was fine, $1000 fix for a rusted line...sad.
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« Reply #233 on: 02/05/13 12:27 PM »

I have an '03 with around 110K.. Lately I've noticed (maybe last 5k miles or so) my fuel pump is running louder... not annoyingly loud, but I don't remember hearing it before...    does this mean failure is imminent, or should I get what remaining life is in it out of it?

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« Reply #234 on: 02/05/13 06:41 PM »

I have an '03 with around 110K.. Lately I've noticed (maybe last 5k miles or so) my fuel pump is running louder... not annoyingly loud, but I don't remember hearing it before...    does this mean failure is imminent, or should I get what remaining life is in it out of it?


Mine did't get louder as it was the line that failed not the pump....but the entire unit needed to be replaced. Hopfully someone will have an answer for you, as a sudden failer is not what you want. 
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« Reply #235 on: 02/06/13 08:55 AM »

Also just for the record, I routinely fill my tank up to Full, and ALWAYS run it down to empty...   so, if what has been said about these pumps burning out is true, mine has had a rough life so far...
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« Reply #236 on: 02/06/13 09:37 AM »

Last year on my way down to Newnan GA I got stranded on the side of I-85 just shy of Peachtree city in my '03 due to my fuel pump.  I ended up purchasing the cheaper AIRTEX from Auto Zone along with a new fuel filter, and crank shaft position sensor, because at the time I didn't know it was the fuel pump.  Ended up dropping the tank myself and in the process broke off one of the nipples off the evaporative canister banghead. Ended up spending $20 at a junk yard to replace the canister.  I just hope I don't regret not spending the extra cash for an AC Delco.  I think I had about 135K on the odometer at the time of the incident.  It seems as though I'm getting worse MPG.  I wonder if that's because of a new pump and filter?
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« Reply #237 on: 02/06/13 05:15 PM »

Also just for the record, I routinely fill my tank up to Full, and ALWAYS run it down to empty...   so, if what has been said about these pumps burning out is true, mine has had a rough life so far...
I also did the same ALL the time...the tank is filled to the rafters and drained to fumes (usually under 10litres/2.5 gal remaining) when travelling and it was a rusted line that let me down. I was told by my mechanic that he has fixed more fuel pumps (not necessarily on Av's) sitting at gas pumps with full tanks so not sure what I really think about the whole thing.
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« Reply #238 on: 02/07/13 01:48 PM »

Paying more attention to the fuel pump now, I just made a discovery...    I filled a full tank of gas, drove around a bit, and the pump runs quieter.  I don't know if this due to the pump having to work harder/overheating when empty or maybe an empty tank causes more vibration?  anyhow, interesting to note the difference...
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« Reply #239 on: 02/07/13 03:47 PM »

Paying more attention to the fuel pump now, I just made a discovery...    I filled a full tank of gas, drove around a bit, and the pump runs quieter.  I don't know if this due to the pump having to work harder/overheating when empty or maybe an empty tank causes more vibration?  anyhow, interesting to note the difference...
Interesting...maybe because it's submersed in fuel it's quiet. Keep us posted if things change with the operation..or (hopefully not) the lack there of.
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2004 Z71 Sunburst Orange Metallic with cladding, 5.3, graphite heated leather, full memory package, On Star,pwr moonroof and everything else, Amber FTDRL's, All-on-HI mod,  bug deflector with custom graphics,vent visors, tinted windows, Bose 6-pack in dash CD, K&N filter, Iradium plugs, sun visor graphics, cross drilled/slotted rotors, maglight mod, Silverado SS gauge cluster w/red pointers, Weather Tech floor liners, custom dual Magnaflow exhaust.
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« Reply #240 on: 03/07/13 01:27 PM »

2013 with 3600 miles and a problematic fuel pump.  Warranty.
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« Reply #241 on: 03/26/13 05:37 AM »

2003 116K . Replaced working pump for reliability
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« Reply #242 on: 04/05/13 08:00 AM »

2007, 145,000km.  Fuel pump works but the check valve doesn't hold sometimes so it takes a second crank to get it going.  I'm not spending $600 just for that.  I'll wait until the whole thing pukes.
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« Reply #243 on: 08/19/13 02:59 PM »

2006 160000 miles. Still pumps fine but top is rusted away and sprays fuel all over the top of the tank.
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« Reply #244 on: 08/20/13 07:45 AM »

No problem 2002 87,600 miles
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« Reply #245 on: 08/25/13 08:17 AM »

replaced at 225k miles
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« Reply #246 on: 11/30/13 03:21 PM »

I think mine died today...kinda  It started to sputter when I came to a red light.  When I pulled away it would only run at about 1/4 throttle.  I limped it home and shut it off and it wouldnt restart.  I banged on the fuel tank and it started up but still sputters when I try to give it gas.  I am going to cut the hole and change the pump, and hope that is it.  If anyone has any other ideas Im all ears.  Thanks
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« Reply #247 on: 12/02/13 11:43 AM »

Junkman,   please follow up on your findings!     I feel like mine is still getting louder...   I loaded some groceries with it running yesterday, 1/4 tank of gas, and that motor running sound is way more noticeable than it has been...    When I fill it up this week it will probably quiet down again... Undecided    not sure if I'm running on borrowed time...

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« Reply #248 on: 12/02/13 03:52 PM »

Do a lot of guys cut the hole in the floor Huh I don't think I would do that on my rig even if it happened again. I would spend the time/money to drop the tank. But that's just me.
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« Reply #249 on: 02/21/14 09:37 PM »

New Fuel Pump today.

recently acquired 2004 Z66, 92,500 miles.

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« Reply #250 on: 02/24/14 08:05 AM »

I have noticed that occasionally.. maybe once a month or so, I turn the key to start and release, but the starter continues and cranks really fast around 15 times before ignition.  I wonder if this is another symptom of a fuel pump that is about to fail?   Normally my truck turns over 2-3 times and starts.

I have a new fuel pump sitting at home, ready to go.   Going to change it when the weather warms up a bit.


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« Reply #251 on: 04/11/14 02:25 AM »

2002 here with 119k.  Still have the original fuel pump, never been changed since I picked up the truck from the lot back in 2001.  Engine is getting harder and harder to start.  Sometimes it will start right away, and other times I would have to crank it a few times.  Will be replacing mine pretty soon. 
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« Reply #252 on: 04/14/14 11:59 AM »

I just returned from a a 700 mile round trip...  mine is still working fine, but still the hum of the motor is audible.  I now carry my spare new one with me including tools.  Hopefully this weekend I can do the swap.  Surprised that over half surveyed have had to change it.  I wonder if that's the real failure number or its just because people come to this thread when they have trouble...
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« Reply #253 on: 05/03/14 07:57 PM »

fuel pump in my 05 went today at 250,435 miles.
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« Reply #254 on: 05/19/14 11:47 AM »

I have a 2004 and my pump was still working but had gas smell when I filled up and hard start sometimes. The sender went sometime around 80,000 miles and I just replaced the pump assembly at 99,300 miles.
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« Reply #255 on: 05/21/14 11:50 AM »

I finally replaced mine 2 weeks ago via the hole cut method.  The old one still works, but it runs with a loud motor hum.   The new one is quiet and I no longer feel like I have a ticking time bomb waiting to leave me stranded...  Cheesy
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