filling the gas tank

[cb63sk]

ok i have this issue for years.... i mean years!!! it takes like 1/2 a hour to fill the tank, it clicks like its full, but you only get like a 1/2 to 3 gal at a time. I had some one look at it, but didn't see any issues. he pull both hoses off, nothing in the way.
tks for any help!

 

[2004Slickside]

Tank has to vent through charcoal canister when filling or it will spit up like a baby. Either plugged charcoal canister, bad vent valve, or plugged vent hoses.

 

[Capt.Crunch]

ok i have this issue for years.... i mean years!!! it takes like 1/2 a hour to fill the tank, it clicks like its full, but you only get like a 1/2 to 3 gal at a time. I had some one look at it, but didn't see any issues. he pull both hoses off, nothing in the way.
tks for any help!

I had to replace the vent valve and the charcoal canister, it did OK with replacing the valve, but every once in a while it would do it again, I replaced the canister and it hasn't done it for a long time now, I ruined my old canister from over filling my tank, when it the pump shuts off don't keep adding fuel, lol, now I just round it to the nearest dollar. I got both of them off of Amazon and they were GM parts, it cost me almost $100.00 for the canister and right around $50.00 for the valve. That's about 50 bucks more than it costs to fill the tank now, lol

 

[Vaeagleav]

I agree with above posts.....

 

[EXT4ME]

 

[joendoodle]

1) Could be the vent cannister clogged / restricted vent or saturated with fuel, quite common w/ GM vehicles.
2) On the inlet to the gas tank there is likely a check / anti siphon valve (Design is to: prevent gas spill on rollover and make siphoning / stealing gas very difficult {thus the method we see nowadays is drilling holes in gas tanks to steal gas}) My 02 Explorer developed this issue (almost impossible to fill in the amount of patience I have), I ran the tank down to <1/2 a tank, jacked it up (from the rear) removed the fill hose at the tank, reached in and reset the inlet check valve.. This restored the ability to fill @ "full throttle".. Good news is, I only needed to do it once in the 18 years I had her.

 

[Wingo]

I just removed the anti-siphon flapper on my 2002 2500, I don't know if the 1500s have one or not, I assume they do. It was easier than expected. The flapper is on the filler side of a T fitting on the small secondary tank, I'd assume it would just be on the filler side of the single tank on a 1500.
To remove I dropped the tank enough to get my hand up there and did it blind. To be fair I dropped both tanks last year so I kinda knew what was up there, with new hose clamps. But to remove that flapper I stuck a right angle pick behind the flapper and pulled, the flap is thankfully attached to a sleeve that fits inside the tank nozzle and came out in one unit. I removed the flapper and put the sleeve back in the nozzle for support and hooked everything back up. Took me about 30 minutes.
I don't know yet if it fixed my fuel fill problem, I have other things torn apart at the moment so I can't drive to a gas station yet.

 

[joendoodle]

I just removed the anti-siphon flapper on my 2002 2500, I don't know if the 1500s have one or not, I assume they do. It was easier than expected. The flapper is on the filler side of a T fitting on the small secondary tank, I'd assume it would just be on the filler side of the single tank on a 1500.
To remove I dropped the tank enough to get my hand up there and did it blind. To be fair I dropped both tanks last year so I kinda knew what was up there, with new hose clamps. But to remove that flapper I stuck a right angle pick behind the flapper and pulled, the flap is thankfully attached to a sleeve that fits inside the tank nozzle and came out in one unit. I removed the flapper and put the sleeve back in the nozzle for support and hooked everything back up. Took me about 30 minutes.
I don't know yet if it fixed my fuel fill problem, I have other things torn apart at the moment so I can't drive to a gas station yet.

I hope this fixes your problem, while you are doing all the work, you should put a label on the bottom of your gas tanks "Anti siphon valve removed, please do NOT drill holes in my gas tanks, steal my gas the old fashioned way by siphoning it out."

 

[T’s BigDawg]

I recent had the Sam problem with my 2500. The filling problem was caused by the canister actually coming apart and filling the evap hoses with charcoal. I had to blow out all the hoses with the air compressor, and got about a quart bag of charcoal pellets. Also had pellets sucked all the way to the purge solenoid. Not sure if your canister came apart, but if it did and you weren’t able to blow the hoses out then this could be your problem.

 

[joendoodle]

I recent had the Sam problem with my 2500. The filling problem was caused by the canister actually coming apart and filling the evap hoses with charcoal. I had to blow out all the hoses with the air compressor, and got about a quart bag of charcoal pellets. Also had pellets sucked all the way to the purge solenoid. Not sure if your canister came apart, but if it did and you weren’t able to blow the hoses out then this could be your problem.

 

[cb63sk]

I had to replace the vent valve and the charcoal canister, it did OK with replacing the valve, but every once in a while it would do it again, I replaced the canister and it hasn't done it for a long time now, I ruined my old canister from over filling my tank, when it the pump shuts off don't keep adding fuel, lol, now I just round it to the nearest dollar. I got both of them off of Amazon and they were GM parts, it cost me almost $100.00 for the canister and right around $50.00 for the valve. That's about 50 bucks more than it costs to fill the tank now, lol

got parts number? tks!

 

[Wingo]

I made it to the gas station to see if my anti-siphon flapper removal worked. Thank goodness it did, although I can't go full horsepower on the pump for long before it bubbles back up, I have to use one of the slower settings which is just fine with me.

But I think the ultimate issue with that is simply the size of the orifice. The inside diameter of that T fitting on the auxillary tank of an 02 2500 is really small, it simply can't keep up with max flow. But in the end I put in 12 gallons in only a few minutes vs half an hour, so I call that a win. Now I can actually use the dang thing without worrying if the next gas stations pumps have nozzles that click off too fast.