Check Engine Light Due to Gas Cap Issue on GMC Canyon

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

RepairPal Verified
Average mileage: 88,058 (28,000–160,000)
7 model years affected: 2004, 2005, 2006, 2007, more2008, 2009, 2010
26 people reported this problem
9 people shared problem details
2005 GMC Canyon70,000
rough idle and engine would gas cap and problem was fixed.
Check engine light... ..turned off after replacing gas cap.. ... came on again.. months later.. not fixed with another gas cap.. Check engine light is on again.. Going to have diagnosis done.. but Terrified of being 'sucked into' the nightmare of "single woman.. unknown problem" .. gotcha.. with Mechanics..!!! Mass air flow sensor? OMG.. not the catalytic converter!!
2006 GMC Canyon28,000
check engine light comes on after a few miles of driving
2006 GMC Canyon90,000
I have the same problem with the gas cap
check engine light on
2005 GMC Canyon118,000
My engine light comes on and my engine idles rough, but as soon as the light goes off (randomly) the engine runs fine. The gas cap light comes on my dashboard warning me the it is not secured, I twist of the cap and put it back on, sometimes this will trigger the warning to go off and everthing is fine. That would be wonderful it that was all it was. I am replacing my plugs, air filter and fuel filter to see if these contribute to the light being on.
2005 GMC Canyon160,000
I am buying my 4th gas cap. original lasted ~95k, two after market failed during next 60k.
2008 GMC Canyon47,000
check engine light not going off- bought new cap
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