Check Engine Light Due to Gas Cap Issue on Hummer H3

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

RepairPal Verified
Average mileage: 80,688 (34,500–120,000)
5 model years affected: 2006, 2007, 2008, 2009, more2010
37 people reported this problem
16 people shared problem details
2006 Hummer H362,000
Engine Light will not go off. It will read fuel cap every now & then. We have tighten the fuel cap and the light is still on. Not sure what to do. It is out of warrenty and I have no money
Upvoted (13)Flag Inappropriate
my check engine light came on with fuel cap loose light
2007 Hummer H370,000
Same issue, bought a replacement gas cap didn't fix it. I would notice the gas cap would get loose after driving a couple times. Replaced with a new factory cap from chevrolet.
Engine light on, fuel cap light comes on after five miles of driving. Plug-in testing reveals unidentified vacuum leak. New cap for 30 bucks does not restore the loss of faith in a part that should last longer than five years.
2007 Hummer H358,000
Check engine light is always on and my dash blinks fuel cap
2006 Hummer H3113,000
Check engine light comes on alot. Tighten gas cap and goes off in two days. Not fixed
2006 Hummer H394,333
engine light keeps comming on ,change gas cap worked for 3 days back on again
2008 Hummer H358,200
Driver information says gas cap loose and check engine light is on. Autozone checker says evaporative system or gas cap.
2006 Hummer H334,500
The gas cap strap got wrapped under the cap after refueling causing the cap not to seal properly. This caused the check engine light to come on until the gas cap was sealed properly.
2009 Hummer H3110,000
Gas cap broke. Replaced with new cap. Shortly thereafter, check engine light comes on periodically.
2006 Hummer H380,000
Check engine light will randomly come on...not just after filling up. Eventually goes off. Took to shop and they said it was the gas cap. They messed with cap and light went off. About an hour later the light comes on again. Grrr.
Engine Light comes on...Disconnected battery to reset computer..goes off for a while 2 weeks, then returns,..now gas cap light comes on intermittently. Will replace gas cap and see what happens.
2007 Hummer H375,000
Same issue....check engine light comes on over gas cap
fuel light comes on at random times i have to constantly get out take it off and put it back on again
Same problem! How do I fix it?
2006 Hummer H380,600
Fuel cap light came on 4 days after gettng gas. Tightened cap and then check engine light came on. Tightened cap again and light will not go off.
Related Items:
Check engine light comes on for a short time and goes off. This happens at random.
If this continues come April I won't be able to pass inspection...PLEASE HELP
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/...
My H3 literally stopped on me while driving. I pull over and while waiting for a ride, I try it...

Related Content