Hello everyone. This is my first post. I hope I put it in the right place. I recently purchased a 2003 Trailblazer LTZ. I’m not quite sure if I have one electrical problem or several. Here is what does not work- both power seats, both heated seats ( switch does not light up when depressed ), key fob, rear wiper, rear defrost, lift gate locks. One of the two license plate bulbs do work. The interior lights did not work when I opened the doors but would work if I pressed the over ride button next to the dimmer and if I turned the dimmer all the way clockwise. The first thing I checked was the fuses under the back seat. All of them ! They all looked good. When doing this, the interior lights were on and then dimmed. They didn’t do this before so while the lights were now dimmer down I opened the drivers back door from the inside and the lights came back on. I climbed out and wondered if the other stuff would work. Sure enough everything now worked ! I did nothing but remove all the fuses one by one and checked each one with my meter on the ohms setting. All were good. Everything worked for a couple days until I went to show my parents my new to me Trailblazer. Now everything but the interior lights do NOT work. First, what is the module next to the rear fuse box ? Second, does anybody think I may need a new LCM module in the liftgate ? I visually looked at the wires in the hinge boot and didn’t see any broken wires but didn’t use a meter on them yet because it’s 20 degrees and snowing out. I rechecked all the fuses again and all are good and that one bulb on the rear plate is still working. The other is probably burned out. Does anybody have any ideas ? Could this be one problem or several ? I would really appreciate any guidance because I’d prefer my wife to drive the Trailblazer in the snow with my grandson, but she can’t reach the pedals now. Sorry for the long post but I wanted to give all the details. Many thanks in advance.