Car Problem Reports

GMC Sonoma Check Engine Light Due to Gas Cap Issue

GMC Sonoma Problem
21 Reports
Me Too

Model Years Affected: 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004

Average Mileage: 92,958 mi (21,965 mi - 209,430 mi)


A Loose or worn gas cap may cause Check Engine Light to illuminate.

  •  Rookie

    Service engine light keep coming on. We finally just replaced the the gas cap and it took care of the problem!

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  • Visitor, , 125,000 mi

    replace cap

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  • Visitor, , 77,000 mi

    after filling up and twisting cap till it clicks 3 times ODB code reads 0442 it does not always happen though!

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  • Visitor, , 209,430 mi

    replaced gas cap 2 times this year.. not sure if its a gmc problem or the kind of gas we all have to deal with now.. I hear its not good and dry rots the gas caps

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  • Visitor, , 21,965 mi

    Light came on after filling up.

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  • Visitor, , 73,477 mi

    Forgot to tighten cap, drew code, tighten cap reset code, vwalla..

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  • Visitor, , 68,750 mi

    loose gas cap--engine warnuing light

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  •  Enthusiast

    04/2010 Freeway road was uneven at end of bridge. I hit dip going 60 mph. Truck bottomed out and I nearly lost control. Check engine light came on. I spent $100 to have problem diagnosed as broken fuel cap.

    03/14/12 Happened again. 13 reported problems? I think the dealer should refund me the $200 I spent to diagnose this problem.

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