I feel ya man. I was worried when I decided to try and loosen a few bolts in the my front doors and the loose wire in my rear doors.
I really can't remember. I want to say remove the screw but then you have to carefully pull up, or slowly pop each one out. Help pry it with a screwdriver.
That's the best link I could find.
http://www.gmfullsize.com/forum/show...ear+door+panel
Again, sorry I can't remember. If I still had my truck it would make this a lot easier for me to remember.
I'm sure another member will chime in.