I have an `03 extended cab that has an annoying creak/squeak from somewhere below the rear window. It's not the jack or components and it's not the rear seats. Is there anything behind the trim panel on the back wall that might be making this noise?

 

Do you have a bed cover? If so look at the mount for it as well as the cover itself for rubbing.

 

Yesterday I took out the rear seats, jack parts, rear seatbelts and everything else that I could remove and went for a drive. It still knocked/creaked/squeaked! I decided it had to be the body mounts so I tried to tighted and or loosen them but couldn't get them to budge. I soaked them with PB Blaster for a couple of hours then with WD40 for a few more hours and now the noise is gone!