Check Engine Light Due to Gas Cap Issue on Chevrolet Uplander

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

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Average mileage: 99,732 (26,432–172,000)
4 model years affected: 2005, 2006, 2007, 2008
47 people reported this problem
23 people shared problem details
"check gas cap" warning keeps coming on. After getting gas I retighten the cap several times. The warning light stays out for couple of miles before coming on again.....and again. Mean while the engine warning light is always on.
anytime i fill it up the fuel ,it wont start right away,
If the the gas cap is not screwed back-on VERY tightly, the CHECK ENGINE light comes on & the gas guage goes crazy. Just turn it SEVERAL times when closing & that seems to do it just fine! If it does go haywire the computer takes about 24 hours to reset.
light came on said check gas cap i did it was tight now check engine light on, wont start after you put gas in it dies at random points, ran computer scan said air leak in gas line
Gas cap light coming on, checked and tightened the cap and now the engine picture light is on...I see I am not the only one with the issue. Does anyone report any stalling or other running issues, Now I am afraid to drive the van which has been wonderful up to now. It runs fine for me with the exception of having to pump the gas occasionally after it has been started a few times during the day.
The van was purchased new and at 18,000 miles the engine light started coming on and stays on. I changed the gas cap, but light still stayed on. My husband had this vehicle as a company van. He told the dealership over and over that light stays on while it was under a fleet or lease plan, but they never corrected it. I have tried to talk to dealership, but they said they can't help me because it has too many miles. It is kind of strange that 161,000 miles of the 172,000 they serviced it, but they never took care of the problem. The dealership has records of everything even 7 complaints of engine light staying on, but like I said they never corrected it.
Whenever i fill the tank with gas my check engine light comes on for about a day then goes off. I haven't had it fixed. Just a weird little quirk. Also the indicator on the gas tank goes to empty right after I fill up then slowly goes up to full by the next day.
check gas cap message went on and know the check engine light is on.
failed inspection after reset tte engine light
check gas cap keeps blinking and dinging
Gas cap will not seal correctly all of the time and cause the check engine light to come on.
I replaced the gas cap and still the same problem. I only had since January 16,2015
I've had this problem many times. Just check the cap and wait for the code to clear.
The car just stop running.I Did not get a diagnosis test as of Oct. 25, 2014. old gas cap. and who knows what.
Check engine light on and it notifies me to check gas cap. I had to replace gas cap every couple of months in order to keep the check engine light off, and to be able to pass the emissions test.
engine light on changed gas cap didn't help
replaced gas cap. Still on. Has been on for 5 months now and mechanic is working on it as we speak. BUT they cant find it with a smoke test. Its been in there days now. Inspection will fail if not fixed.
Everytime I fill up with gas low fuel comes on and then the check engine light comes on. I drive it to work and back. Take the cap off and ususally the next time i start it the check engine light goes off.
Check engine light comes on due to gas cap not sealing.
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