Thanks Overboost for the extra help!
I was able to successfully reprogram the new LCM.
Now the old owner had also ran the wire for the stop signal from both stop lights to the tailgate.
Which is why, in restoring all the proper lights and wiring, I was wondering which lights are supposed to light up when you press the brake pedal?
Only quarter panel lights (and the one on top) or brake lights include those on tailgate as well?
After I disconnected the extra wire linking two brake lights on quarter panels, the tail lights on tailgate stopped working.
However there's only 2 wires going to their connectors