I moved to Florida and left my 2002 trailblazer at a friends house. He was starting it every now and then to keep things going, and one of the last times before I got back he noticed that the key fob wouldn’t work, then he got in and started it and noticed that none of the windows would work, and the lock switches didn’t work, and that the lift gate didn’t unlock so that won’t work either. When I got it back, I noticed that the interior lights didn’t work so I looked at fuses and wiggles wires around the BCM and the interior lights now come on when the two back doors are opened, and they come on when the ignition is on and is turned off and the key is taken out, but not when the front doors are opened.