Check Engine Light Due to Gas Cap Issue on GMC Yukon XL 1500

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

RepairPal Verified
Average mileage: 109,500 (99,000–120,000)
5 model years affected: 2004, 2007, 2008, 2009, more2010
6 people reported this problem
2 people shared problem details
GOT A NEW CAP FOR GAS TANK, ISSUE REMAINS
Engine light code indicated loose gas cap - replace. I have replaced it 3 times parts store caps and oem caps. Still get light about every 6 months. When I open gas cap, gas tank is pressurized!
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