01 Silverado door locks

the lock wires are at the bcm. its the far left plug, and your looking for a ltblue and a white that are right next to each other in the harness. In the middle plug, you'll find a brown wire you can use as a positive parking light trigger, and in the right plug you'll find a light green and a tan. the light green is the disarm for the factory security, and the tan is the re-arm (door trigger). If you have poewr locks and windows, then you definately do have the factory security, and will have to interface with it too. And check all the connections with a DMM. You can really f*ck up a BCM by tying into it incorrectly. If you are on the right lock wires, your DMM will show a polarity change when you hit the switch. If you don't see one, then its not the right wire. Lock wires should hold at 12V as long as the swith is pressed.Northstart.....or start it your damn self.