What kind of Pontiac? Bonneville, Grand Am, Grand Prix, Firebird, Sunbird, Sunfire, Parisenne, etc? You probably have a bad latch, replace it I just ran across this on my car and all I had to do was check latch alignment and align the latch
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.
it "should" be to the right side and bellow steering wheel .if it is equipped with one.maybe check at trunk latch first to determine the car has this"option" In my 2001 Sunfire, it is on the left side bellow the steering wheel.
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.
With a Large Hammer
One that fits.......
in the trunk or under your back seat
you go to the dealership
beside the drivers seat...on the floor
How do i get the trunk to close when it sometime works
If you mean just the bulb, they are accessed from the trunk. Pull the carpet away from the back of the car and untwist the bulb holder. Replace the bulb and screw the holder back in.
I can't be 100 % sure as I'm not real familiar with your model, but my earlier Sunfire's bulbs are accessed from inside the trunk, You'll have to pull the carpet away from the body, then twist out the bulb holders.