I don't recall ever needing to pull one of the tailgate trim panels
(although I may have done it once). The instructions and diagrams in the
service manual are sufficiently vague that I'm not sure where all the
screws are. I expect you'll need to remove the pull handle. You may also
find some screws behind the side trims at the top of the trim panel. Other
than that, what you see should be what you get, I'd think.