The following is a how to for strut removal and installation for 97-2003 grand prix.
Step one: (if you do not have an impact) loosen lug nuts 19mm
Step two: raise and support corner you are doing the job on
Step Three: Remove wheel and tire
Step four: Remove sway bar end link (18mm nut) 15mm head on back of stud to hold it.
Step five: Remove lower strut nuts 21mm (13/16)
Step six: Pound out strut bolts. (leave nut on end at first to not damage threads) You will need a hard hammer to do this the rubber one shows up better in the picture
Step seven: open trunk and find strut plate nuts
Step eight: pull carpet down (it just hooks around the studs)
Step nine: Pull off rubber strut caps
Step ten: Remove strut top plate nuts (15mm) Ratchet wrench works great.
Step eleven: Slide strut back off rear knuckle and remove. You will need to twist it some to get it to slide out. Will get more pics tomorrow. Need to find some new top plate washers.