gmc rear window problem

Hmm. I haven't tried that feature on one of those trucks yet. I do know that only the front doors have electronic modules inside them.........the rear doors are wired into the body just like any traditional car. Hopefully the XK01 really does have the ability to do the rear windows. Did you hook up the relay from the XK01 to power the truck's accessory wire?

the xko1 does not do the rear windows....it only has bus control over the fronts.

you may need to wire up a seperate window controll mod or wire a couple relays directly to the rear window