2004 Chevrolet Colorado Q&A
2004 Chevrolet Colorado Question: check engine light
It sounds like your Ignition switch is defective and not completely turning off. here is some info about the light when it is on while driving http://repairpal.com/check-engine-light - dandd
I had it happen in mine too because of the gas cap. To reset the check engine light, as soon as you turn the key,pump the brakes hard 3 times. That fixed mine. Though it always reappears. - colorado wrona
your alternator might be shorted out internally. try taking it out and having it tested. my truck had the same problems. i also had problems with power locks and windows when the battery went dead - Visitor
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
My check engine light will go out when I fill the gas tank. fill it drive about a mile and restart engine light out...
The engine may develop a misfire due to worn valve seats. This fault will cause the Check Engine Light to illuminate. Replacement of the cylinder head may be required to correct this concern.
Check engine light on #5 cylinder misfire on the 3.5 engine
I continuously have the check engine light come on. when i check the code it just says cylinder 3 misfire. I can go to the parts store an...