Two problems related to starter have been reported for the 2004 Chevrolet Colorado. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Chevrolet Colorado based on all problems reported for the 2004 Colorado.
Vehicles bcm-body control module is defective or the system in its self is defective. Vehicles will not start or may shut off at random from time to time. Scan tools will not be able to recognize the problem as the bcm. So repairs made may make it seem like it fixed the problem but a couple hours/days/weeks later the problem will disguise it self as something else or even come back as the same problem. I myself was told it was the starter and hey it worked, until 3 hours later. Then told the ignition passlock was defective, got it fixed until 1 hour later. Now I have narrowed it down to what controls the whole system, the bcm. Many people have complaints about this same issue all over the web forums, I dont know if any has been reported to NHTSA. So I figured I would start. I have this system effects 2004-2012 models of chevy Colorado, GMC canyon and hummer h3.
Everyday now when I try to start the truck it turns over but will not start, wait 15 minutes then it will start. Today when I tried it the first time it turned over but would not start so when I turned it off at the key it stopped then tried to start again on its own for about 8 to 10 secs. The starter turned the engine over without touching the ignition switch it then stopped for about 3 or 4 secs then tried to start on its own again without touching the key, it did this start sequence 3 times in a row. The gm passlock system is terribly defective as reported by all the reports online and I believe my problems are a result of this system.