I was in a similar pickle a LONG time ago as a young body man. I ended up pulling the seat from the passenger side (car not truck but should work the same) using access from the passenger side, pull the door trim panel then work on the guts of the door. Good luck.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.