Car Problem Reports

Chevrolet Silverado 2500 HD Check Engine Light Due to Gas Cap Issue

 
Chevrolet Silverado 2500 HD Problem
14 Reports
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Model Years Affected: 2001, 2002, 2003, 2004, 2005, 2006, 2007

Exhaust & Emissions Affected: Gasoline

Average Mileage: 80,658 mi (43,000 mi - 173,000 mi)

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Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

  • Visitor, , 43,242 mi

    Check engine came on when engine was started . Did code check... it said evap problem . Gas cap o ring showed light wear . Installed new cap and cleared code ... check engine light off on restart.

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  • Visitor, , 86,000 mi

    CHECK ENGINE LIGHT COMES ON THE IT SAYS TIGHTEN FUEL CAP ON THE DASH

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  •  Rookie

    Frustrated. I have a 2500HD 6.0 with 173,000 mile. Never a problem until now. The check engine light came on, so I had it diagnosed and the code said bad fuel cap. I also informed the mechanic that I don’t have any very little power at take-off. The mechanic said it could also be the catalytic converters are plugging up. I replaced the catalytic converters, which seemed to change the power issue. However, I still have the engine light stating a bad fuel cap. WTF. I removed the fuel cap and the truck starts and runs normal. However, now, when I fuel up the truck, it doesn’t want to start and it takes several cranks to start, and then it sounds flooded.

    I don’t know where to start. The truck runs fine until I fuel it up, and then it takes several attempts to start the engine.

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  • Visitor, , 50,736 mi

    gas cap turns engine light on...

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