Check Engine Light Due to Gas Cap Issue on Chevrolet Avalanche

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

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Average mileage: 78,335 (10,000–130,000)
4 model years affected: 2007, 2008, 2009, 2010
21 people reported this problem
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Viewing 1 - 6 of 6 problem details
this is a constant issue. we have even tried purchasing new gas caps but the issue still happens.
2007 Chevrolet Avalanche 10,000 mi,
Check engine light code indicated a faulty gas cap and evap
2007 Chevrolet Avalanche 55,000 mi,
gas cap loose wont tighten check engine light comes on
2009 Chevrolet Avalanche 46,000 mi,
Back in December, I had my engine light go on. Had the problem checked and I was told that there is a loose or faulty gas cap. Have not replaced gas cap yet.
2008 Chevrolet Avalanche 130,000 mi,
Replaced gas cap and light still stays on
2008 Chevrolet Avalanche 78,000 mi,
Check engine light comes on. I get the code read and they tell me it's my gas cap. I've replaced the gas cap and it hasn't fixed the problem.