[Untamed]

Make sure the shifter plate is tightened to the center console. It will squeek and vibrate.

Make sure the ash tray is screwed in or that will rattle as you drive.

The guage bezel will vibrate over time as sunlight destroys it. Again, tighten that down.

The spare tire was already mentioned.

If you have an automatic pull down for the hatch, make sure its pulling the hatch all the way down. The heavy glass will actually make the whole hatch vibrate as you drive.

If you have a carbed or TBI car, make sure the air cleaner is tightened.

Sometimes people cut the hanging bracket that holds the exhaust pipes when replacing / removing the cats. Its located right behind the cat. The pipe can vibrate on bumpy roads if the hanging bracket has been cut.

Finally... the whole damn car will squeek simply because 3rd gens are 20 +- years old. SFC's will help, but the little things listed above can be hunted down if you have a sharp ear while driving.