Bodyshop removed the trim piece on the rear deck lid. Does anybody here know how that thing is attached to the deck lid? Well, I'll tell you. It is not simply screwed on. There is a rubber piece on each end that screws to the deck lid. There is also a thin metal tab that is riveted to the trim piece in the center right by the key hole and screwed to the deck lid. Well, these three pieces turned up missing when I went to install the trim. Luckily I had a spare deck lid with that trim piece attached. The trim is discontinued by GM.