The one you linked to says it is for a sedan. I have a 2 dr. One of the 2 bulbs is burnt out so you can literally see on a portion of the plate. They also light up the word "Pontiac" on the back of the trunk lid. There are no screws around it. I'm at a stand still.are you trying to change the bulb because it is burnt out?
The lamp looks like it is attached with two screws