Rear lift gate/key fob issues
I just recently picked up a sweet Trailblazer. This truck is in amazing shape, even though it's an '02. Clean inside and out. I bought it knowing that the lift gate didn't work, but as I got to know the truck realized it's more than just that. The key fob doesn't function, the lift gate and rear window won't open, and the rear defrost and wiper doesn't work.
I first replaced the battery in the key fob. Then replaced the key fob. The truck itself does not respond when I try to program the key fobs, even though the key fobs have been tested (so I know that's not the issue).
Getting on the forums, I found that the Lift Gate Module was a common issue with the Trailblazers, so I ordered a used one (in order to avoid having to have it programmed at the stealership) and just installed that.
Do I need to replace the Body Control Module? Something else?