Egr valve location

[pitgraphics]

ok  First I am  new on  this  forum  but  is   very  similar to  the  motorcycle  forum.
any  way  I  got my  avalanche  since  2004   right from  the  dealer  and  I never  have problems into  now. I now  I have  to  replace  my  EGR valve but since  like  this  valve  do not want  me  to  find  it     been  all over  the  truck  an I  don't  see it. I  even got  the  book from  autozone   but  the  book is  telling me  the  is  at  front  and  is  not  there   I  guess I need  some  help  I  Hate  to  have  my  check engine  light  on .
ok  thanks  so  much   for  you  time  to  read this  post

[MS03 2500]

OK I'll take the bait, what code did you get to think you have a problem with a EGR Valve

[pitgraphics]

thanks  for  you reply , well  I  take the  truck to  autozone  and  the  put  there computer  on it  and  they  tell me  the was  the  egr valve but  I  don't see one  in the  truck . i  did no  ask  for the code.

[MS03 2500]

thanks  for  you reply , well  I  take the  truck to  autozone  and  the  put  there computer  on it  and  they  tell me  the was  the  egr valve but  I  don't see one  in the  truck . i  did no  ask  for the code.

I got you now if they will give you the actual code we can help you. It should be PXXXX number the Xs=numbers.

AutoZone just love to sell you parts that you don't need. 

[pitgraphics]

ok  I  guess I  will get back o  even  buy  my  own code  reader  and  I will  let  you know  tomorrow .
thanks  again for  you  time 

[ItsStopher]

What year AV?

Look here at this pic, between 4 and 5 on the exhaust manifold. If you had one it would be there, or it may be on the end of an extention tube.

[pitgraphics]

2004 . 1500

[Z66 BUTCH]

Thanks for answering his question ItsStopher.

[pitgraphics]

great thanks again . i  love  these pictures

[ItsStopher]

  to the club 

[ygmn]

Doubt it is EGR valve... as they rarely need replacing since all they are is a check valve allowing flow from crankcase into intake one way...was describing PCV Brain CRAMP Sorry

Get error code from check engine light.
report code here or search it on interent for advice on what to check.
check engine light does not mean change a part...
It means something is wrong in a certain system... and one needs to trouble shoot properly...

good luck

[pitgraphics]

I will get the code today after work and post it 

[Canadian AV]

Doubt it is EGR valve... as they rarely need replacing since all they are is a check valve allowing flow from crankcase into intake one way...

Get error code form check engine light.
report code here or search it on interente for advice on what to check.
check engine light does not mean change a part...
It means something is wrong in a certain system... and one needs to trouble shoot properly...

good luck

I think your thinking of a PCV  that vents the crankcase to the intake.
EGR means Exhaust Gas Recurculation.  Its takes exhaust gases and routes it to the intake manifold.  Quite possibly it could fail or stick because of the carbon deposits that can stick to the valve needle.  I have an 02 and it has no egr valve on it.  I've only ever seen them on the 4.8L engine.

[pitgraphics]

ok good  to know so is not  a  Egr valve .
any  way  I  got  the  code   is  P0442

[ItsStopher]

See if these help....

DTC P0442/gas cap?

That P0442 Code (Again)

Fuel System= Help!

[pitgraphics]

I  got  the  new cap  but  i don't  know  how  to  reset  the  check  engine light  still  on.
Now  I will check  the  EVAP  vent valve  tomorrow.
is  there any  good book for  the  avalanche  I  guess now  that  the  car   just  got  out of  warranty  I  need  to  learn  more  about the truck .

[ItsStopher]

AutoZone or one of the other stores will be able to clear it for you, or it will clear itself after so many times you run the AV.

[pitgraphics]

ok  guys  I hope  this light goes away  but  I  want  to  thank you guys  for  you help . this  is  a  great  page  and  nice  way  to  get  new  friends .
thanks  thanks  thanks .

[ygmn]

I think your thinking of a PCV  that vents the crankcase to the intake.
EGR means Exhaust Gas Recurculation.  Its takes exhaust gases and routes it to the intake manifold.  Quite possibly it could fail or stick because of the carbon deposits that can stick to the valve needle.  I have an 02 and it has no egr valve on it.  I've only ever seen them on the 4.8L engine.

Correct my bad..

I was reading two posts at one time... and got them confused..

Editing my post above

[pitgraphics]

Ok guys light went away today .

[ItsStopher]

Ok guys light went away today .

[Grid]

I got the P0442 code today!  Did a search and looked at the threads.  You can go from sublime to ridiculous (at the dealer) really quickly so this is what I can contribute from http://www.obd-codes.com/p0442

Code P0442:  Evaporative Emission Control System Leak Detected (small leak)

What??:  This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

Causes:  A code P0442 most likely means one or more of the following has happened:

    * A loose or improperly affixed gas cap
    * A non-conforming gas cap (i.e. not factory/original brand)
    * A small leak/hole in a fuel vapor hose/tube
    * Other small leak in EVAP system
    * Faulty vent o-ring seal

Possible Solutions:
With a P0442, the most common repair is to:

    * Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
    * Otherwise, replace the gas cap, or
    * Inspect the EVAP system for cuts/holes in tubes/hoses

(Note:  To clear the codes see Autozone or buy a cheap code reader (invaluable) and clear them yourself.)

I have done step 1!

Grid