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  1. #1

    Default EGR VALVE in 2003 silverado

    Does a 2003 silverado 1500hd contain an EGR valve or sensor? I was just reading something and wondered if this was in my truck? Can it be taken out or bypassed? etc.
    Owned Pickups:
    2003 Silverado 4x4 Crew cab 6.0L
    1996 Silverado 4x4 Ext. cab 5.7L

  2. #2


    Should have an EGR valve. Maintenance schedule says to inspect/clean at 60K or 4yrs. Why would you want to bypass it?

  3. #3


    Because my throttle body keeps getting gummed up, and i have heard this can be the culprit. i also hear it takes away from horsepower?

  4. #4


    Quote Originally Posted by derickheggie View Post
    Because my throttle body keeps getting gummed up, and i have heard this can be the culprit. i also hear it takes away from horsepower?
    As Mentioned by jreagan......Inspecting your EGR Valve is something that should be looked at.....went a EGR Valve is Clogged or Malfunctioning, it can Cause irregularities in Engine Performance such as Rough Idling or Valve knock, Indicating that the EGR Valve should be Inspected.....

    Other Items that could cause your Throttle Body to get Gummed up could be.....Air Filter....MAF Sensor.


    5.3 l 3.73 l G80

  5. #5


    The truck won't run right without it unless your building a track truck. If you remove it on a basic stock truck you will hurt the trucks performance. As '99HEARTBEAT said, I would remove the throttlebody and clean both sides with a soft toothbrush and throttlebody cleaner. DON'T use carb cleaner as it will remove the coating that is on the throttlebody blade. Seafoam and CRC are both good for throttlebody cleaning. Seafoam also has a kit to clean the intake manifold, you can see a vidieo on Seafoams website. I would also clean the MAF with CRC MAF cleaner, its in a silver can. CRC is the only company that I've seen that makes a MAF cleaner. Here again DON'T use carb or throttlebody cleaner on a MAF sensor.

  6. #6


    Thanks, Will sure give it a whirl.

  7. #7


    Most 2003 Silverado's don't have EGR valves. Mine doesn't. The ones I have worked on don't either.
    Current Daily Driver:
    2003 Chevrolet Silverado 1500 - 4WD - 4.8L V8 - True Dual Exhaust Setup, Cat Delete, Cherry Bomb Glass Packs

  8. #8
    stephan's Avatar
    Join Date
    Sep 2010
    Far West, Oregon USA,
    Blog Entries


    X2 & X3 if yours has one, don't bypass it or take it out. EGR valves actually help your MPG & help clean the air so it's a win win. Just check & clean it like mentioned above.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol

  9. #9
    Sr. Apprentice
    Join Date
    Jan 2011
    Lake Conroe Tx.


    What about the PVC valve? Some corvettes put a catch can before the PVC to stop the oil vapors from gumming up the Throtle body

  10. #10
    Sr. Apprentice
    Join Date
    Mar 2011
    Alabama, currently


    the pcv valve on these trucks go into the side of the intake(after the throttle body) and i also have an 03 silverado and was curious about the EGR vavle and looked it up on alldata..NO 2003 silverado came with an EGR valve, all the other years i looked at did.
    03 Z71
    flat black toolbox
    black bowtie
    Spectra CAI
    DiabloSport Predator
    si/do CherryBomb Vortex muffler
    2.5" SS Magnaflow tailpipes
    4" black exhaust tips
    headlight mod - low beam, high/low beam

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