On my 95 ATX the problem areas are:
Areas:
1) Door weatherstripping
2) Instrument panel bezel (the part that contains headlight switch, rear defooger, redundant radio controls).
3) Rear seat when no one is in it
4) Centre console
Explanations:
1) When not raining the doors squeak as the Gen II flex-o-matic body flexes. The cure is to lubricate the weatherstripping with a silicone spray. I do this once a month. I also apply the silicone to the trunk weatherstipping and the weatherstipping that runs across the width of the engine bay close to the firewall under the hood.
2) Fixed with velcro.
3) The squeak comes from the 2 brackets that attach the bottom of the rear seat back to the body. Specifically it is the bolts on the seat back itself rather than the bolts that connect the seat back to the floor.
4) The part of the centre console that contains the cup holder contains tabs that slip into the bottom half of the console. I wrapped the tabs with friction tape and re-installed the top part of the console.