Problem Reports

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.

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.

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

gas cap will not tighten/seal properly.

i had to replace cap at @ 12000 miles thought this to be a little premature