Car Problem Reports

GMC Yukon Denali Check Engine Light Due to Gas Cap Issue

GMC Yukon Denali Problem
31 Reports
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Model Years Affected: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008

Average Mileage: 91,833 mi (45,000 mi - 150,000 mi)


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

  •  Rookie

    check engine light came on and message appeared that the gas cap needed to be tightened. had diagnosised to determind gas cap was no longer sealing properly- replaced gas cap, but check engine light still on

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  • , , 70,000 mi

    Engine light due to gas cap

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  • , , 150,000 mi

    Gas cap sensor triggers check engine light. Despite replacing gas cap at the dealership the light goes back on.

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  • , , 86,500 mi

    Gas Cap Seal

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  • , , 118,000 mi

    wire that connects to rear window defogger has broken off

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  • , , 80,320 mi

    check engine light

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  • , , 50,000 mi

    Worn gas cap causes check engin light to come on. Only the $25 GM cap works to fix the problem.

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  • "tighten fuel cap" persistent problem, replaced cap, replaced tank vent solenoid (that fixed the slow fuel fill problem). Cleared faults for about a month then get a periodic "tighten fuel cap" and check engine.

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  • , , 97,000 mi

    Engine light on.

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  • , , 67,000 mi

    My check engine light came on and i took it in to get it diagnosed. it was a gas cap leak. they replaced it with a factory gas cap. i had an aftermarket locking cap before.

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