Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hello, my name is***** the only issue prior to replacing the BCM the fact that the battery was dying?
Thank you. It sounds like you have either a defective BCM or the dealer is not wanting to reprogram it properly. I have seen a lot of defective BCM's from Dorman. I have also seen a bad ignition switch on this vehicle cause a series of similar issues. The ignition switch is the most common problem I have seen to cause a battery drain on this car.
The only way to know for sure would be to install a TECH II computer scan tool or equivalent to see what the BCM is commanding. This would tell you if the BCM is commanding these circuits to come on meaning that the programming is not correct, or if they are coming on without a command it is the BCM. I can almost guarantee that it is the BCM.