Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Welcome, I'm Chris (aka Moose), my normal schedule online is around lunch and after dinner till early morning.
The door ajar switch not working or sticking is the likely issue here. We need to OHM test the door jam switch to ground from the GY/BK wire and monitor with the door opened and closed. To see if the reading shows opened and then closed circuit. If not the the switch is bad. If so then its a wire concern back to the BCM. https://dl.dropboxusercontent.com/u/90220402/gybk.png
Please read this:
Thanks for using Just Answer, Chris
Did you do the electrical tests to check the wiring to the BCM I outlined?