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Thread: Fuel filter 2003 Sierra 6.0 gasser ?

  1. #1
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    Nov 2011
    USA camping sites and back-country

    Fuel filter 2003 Sierra 6.0 gasser ?

    Where do I find the fuel filter on a 2003 GMC Sierra SB-Xcab 4x4 6.0L ?

  2. #2
    Senior Moderator chevychase's Avatar
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    Oct 2010
    truck forum .org
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    Should be on driver side frame rail two 16mm nuts i think .
    Open gas cap . And open nuts slowly will have some pressure . So watch your eyes.04 went to the in tank type.

    If you do not see maybe late 03,s went in the tank life time filter.

    Gitter done have fun. Running on empty...running blind...running behind.....

  3. #3
    Z15 is offline
    Senior Member Z15's Avatar
    Join Date
    Sep 2010
    Upper Michigan
    Note - Use flare nut wrenches or you could possible damage the nuts making it nearly impossible to remove. Seen it done, guy came it with the nuts completely rounded off and chewed up and still could not break it free. Service manager refused to work on it.

    chevychase likes this.
    2012 GMC Sierra Denali AWD 6.2L

  4. #4
    Join Date
    Jul 2011
    Central Oklahoma
    Or even the right fitting wrench will help, at all cost DO NOT use a adjustable cresent wrench as it will not fit tight enough and will flex open thus will end up rounding the fittings, trust me I know. Cresent wrenches cause more harm then good.
    1994 white ext cab chevy silverado 5.7 rolling 230k miles
    stock with air filter lid flipped,
    open flowing exhaust to a 40 series flowmaster dumped.
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