If you're asking about the piece that lights up Pontiac across the trunk lid, it comes off from inside the trunk. There are half a dozen or so, screws. I had to pull mine off to get at those lamps that make the PONTIAC logo light up. Normally, you can get at those lamps, but mine were stuck in there pretty tight.
You must first remove the trunk door facia. (This is the part with the "Pontiac" lights in it.) Then you can get to the bulb to replace it.
in the rear facia, under the trunk lid there is 9 bolts holding the facia on. You must remove the nuts and pull the facia out and right above the license is the two bulbs 194. replace the bulbs and put the facia back on and you are on your way.
It is one big peice that must be removed. If you open the trunk, look on the inside of the lid behind the license plate, and you will find a few nuts that once removed, will allow you to remove the entire rear facia panel that the license plate bolts to and which houses the "PONTIAC" lights.
One in each door have to remove door panels for access & 2 0n deck lid in trunk get acces to trunk for these speskers.
The trunk light switch on a Pontiac Sun Fire is typically in the latch assembly. This is usually inside the trunk and under the carpet.
One that fits.......
you go to the dealership
in the trunk or under your back seat
it seem to be the trunk plastic is broke and I have brought the the part and wont to fix it
beside the drivers seat...on the floor
There's a black cord inside the trunk on the top left.
Bad trunk lid gasket. The gasket may have come loose or got cut.