Check Engine Light Due to Gas Cap Issue on Chevrolet Colorado

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

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Average mileage: 79,248 (10,000–142,200)
7 model years affected: 2004, 2005, 2006, 2007, more2008, 2009, 2010
42 people reported this problem
20 people shared problem details
The check engine light on my 2005 Chevy Colorado kept coming on. I took it to a garage and had them hook it up to their computer. they told me it was due to my gas cap.
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fuel cap light on, and check engine light on. Replaced gas cap twice, still does it.ANNOYING!!!!
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This has happened and i replaced the gas cap twice! Yes, the CEL went off BUT NOW back on, had the shop hook it up and test. It is caused by a BAD PCM! The comp. bad causing all kinds of electrical issues such as the rear light out, blinkers would work then randomly not. The heater and ac work n not work when ever it felt like it, and the CEL and gas cap notice on dash. The shop stated Colorado are known for electrical issues and it seems as if everyone is working around the issue and never actualy get the problem and it re-occurs after time and it is the PCM causing mis reads and missfires on codes and all electrical issues.
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The fan for the heat a/c quiets working at regular intervals. The resistor pack has been replaced and the wiring harness has been repaired, but the problem is still there.
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cant seem to stop the light from coming on after three gas caps newly replaced. anyone have a fix
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need to replace the gas cap every two years
Check gas cap message, failed inspection twice
check engine light comes on. problem could not be found. persisted for approximately 3 years. judy took it in for another look and they, the dealer, found that there is a hole in the gas tank. i was told that i needed to change the gas tank. Prior to this, i has the gas cap replaced 4 times, the gas line to gas tank replaced and everything else up to the tank replaced just last year. from the gas cap to the gas tank is all new, less than two years old.
check engine light on. replaced cap and went off for a few months. back on again.
Check engine light came on, replaced gas cap, fixed problem.
I have had the same problem.. replaced the cap twice. 2nd time from dealership. They (dealership parts man) told me what ever the problem was it would hurt anything to ignore it
same as noted not fixed yet
Replaced the cap, seems to have fixed the issue... For now.
About once a week check engine light comes on, usually after filling tank. Problem still not resolved but sometimes tightening the gas cap turns the engine check light off
Engine code, replaced gas cap, and @j 60,000 engine light came back on send bad gas tank vent valve
gas cap will not tighten/seal properly.
Check engine light on constantly,low idle or replace gas cap
i had to replace cap at @ 12000 miles thought this to be a little premature
intermittent check engine lght with random misfire code. engine runs great
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