2003
I currently have 2 problems that I can't figure out, wanted ya'lls take on them.

There is a squeak somewhere in the driver side rear wheel area. I have air suspension and my bags do need to be replaced but i'm pretty sure their not the culprit.

The squeaking happens all the time, I can hear on low speed bumps and when I get out of the truck my weight makes it squeak. I can put weight on the rear and you can hear the squeak so I'm pretty sure nto body mounts

Second problem is I can't figure out how to remove the lift gate upper molding where the 3rd brake light is attached, I wanted to take off the brake light and took out the two screws but that didn't work so I decided to take the whole assembly off and took out the push lock pins, but it was still held down by something at the brake light

 

The squeeking could be several things. I would first check all of your shock mounts and then all suspension bushings.

If your t-bars have been cranked and you have stock shocks I can guarnatee your front shock mounts are bad.

Best thing to do is lay under the truck and push/pull on the truck with one hand and feel/listen with the other hand where the vibration might be comming from.

Wish I could help on your taillight problem.