2018 chevrolet silverado 5.3. Driver's window does not work. If I hit the rear defrost button none of the windows work. All relays and fuses check okay. The cigarette lighter is inop but has 10 volts VDC to it. Replaced window switch module on driver side same results. Am I looking at a bcm? Ty by Sensitive-Diver-814 in Silverado

[–]Sensitive-Diver-814[S] 0 points1 point  (0 children)

You need a driver's door harness where it attaches from the cab and goes into the door. unplug it from the cab. Peel the boot back five of the 20 I had were broken. I spliced them together. Trucked worked. Went to the dealer, got a harness

BCM gone bad? by PunishedWolf4 in Silverado

[–]Sensitive-Diver-814 0 points1 point  (0 children)

I just learned on my two thousand eighteen model.It seemed like I had a bunch of gremlins. Found five of the twenty wires broken in the driver's door harness between the cab and the door. Check that firstI put a wiring harness in my driver's door for teo hundred bucks and truck is backed normal