This description is from my 1991 Olds FSM so your car should be somewhat similar.
It says to remove the following; Sunshades, Coat Hooks, Assist Straps, Interior Lamps, Fiber Optic Assembly Cover(if present), Shoulder Belt Trim Cover, Lower Lock Pillar Molding, Roof Inner Side Front Moulding, Upper Rear Quarter Trim Panel, Windshield Pillar Upper Garnish Molding. IMPORTANT! Headlining is secured to the roof by 5 to 6 patches of hook and loop material(i.e. Velcro). Carefully serarate in order to avoid tearing fiberglass substrate. Recline seatback if possible. Also position seat as far rearward as possible.
I guess they say that about the seats if you intend to remove the headliner from your car. Also, if you're removing the Headliner it says to go thru the Right Front Door. Oh, and it also says that you'll need a Trim Pad Remover