Join Date: May 2005
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Just be careful. This may be a bit more difficult than it looks.
Something you may not know about 03-up GM wiring is that everything runs on Class2 data. Its not just simply a 12v+ and ground from the switch to the lock cylinder anymore. The door modules actually send a signal to the BCM and then the BCM tells the lock cyl to unlock/lock.
Yeah, its odd, but thats the way GM did things. I'd look at the wiring at the lock cylinders to see if its possible to tie in there, if you cant find an adequate place anywhere else.