Originally Posted by juddholland
The interior trim pieces on the tailgate are grained, hard plastic. It is completely hollow. There is no insulation there--no foam, no paneling, no gaskets, no nothing. Just welding, molding, and screws.
You're absolutely right. That's the spot making intermittent squeak and rattle coming from. Simply can replicate noise by pushing those three trims.
I'll fix it by myself pretty soon and will let you know. Also thinking about this too. Just like F12 door treatment with 3M insulation for the tailgate.
Bottom pic showes someone already did it for the front doors.