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  1. #1

    Default tighten gas cap warning

    Getting this alarm tighten gas cap, and its tight. Check engine light is on.

    Any ideas?

    John

  2. #2

    Default

    06 gmc 4.8l cc 4x4

  3. #3

    Default

    I know that if the gas cap does not seal, it will throw off the emissions readings. There is probably a sensor that monitors the pres. on the fuel tank. If it is showing a bad reading the CEL might come on. Just a thought. Good luck!


    2010 Z/71 Colorado C/C
    Black 4X4 w/5.3L V8
    ===============
    2007 Winnebago Adventurer
    w/8.1L Chevy & Allison 6spd.
    Canyon Lake, Texas

  4. #4

    Default

    I had that on my buddies 05 Jimmy. Replaced with aftermarket cap...problem fixed



    Jamie

    2007 Ford E250(Work van) (Ya, Ya, shut up!)
    1996 GMC Sierra SLE 1500 5.7L/4L60E

  5. #5

    Default

    This just to get my three posts to remove sticky on home page.

  6. #6
    Jr. Apprentice
    Join Date
    Jun 2009
    Location
    Lake Norman, NC
    Posts
    19

    Default

    Dont buy anything.

    When this tank of gas runs out, buy gas at a different station, then put the gas cap back on as you normally do.

    This should take care of the problem. Usually caused by a bad tank of gas, or the gas cap not put on tightly enough.
    Tom -
    2005 Suburban 4x2
    2005 Equinox LT AWD

  7. #7

    Default

    Quote Originally Posted by 05-Burb View Post
    Dont buy anything.

    When this tank of gas runs out, buy gas at a different station, then put the gas cap back on as you normally do.

    This should take care of the problem. Usually caused by a bad tank of gas, or the gas cap not put on tightly enough.
    Bad tank of gas????? Please explain, Thanks.
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows



    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

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