2001 Pontiac Grand Prix GTP 4dr Sedan (3.8L 6cyl S/C 4A)
The Supercharged 3.8 Series II engine is very reliable. 100,000 miles and the engine is flawless, but the rest of the car started falling apart. The Supercharger is not a serviceable item, so when the bearing goes out you have to replace the whole thing ($600 rebuild w/ installation). Both front wheel- bearings needed replacing. Power- steering pump went out. All within 10,000 miles of 100k. The car is definitely worth keeping and repairing. The GTP is the only way to go. If you are considering a Grand Prix, only get one w/ a Supercharger (20% more horsepower than the GT, and it shows). Before buying one, listen to the supercharger, if you hear a grind, get it replaced.
Power! Zoom. Traction Control great on ice. Car accelerates quick on slippery roads. Bose Speakers! OnStar was great, but was an Analog system that wasn't upgradeable. Forced to disable OnStar.
Seats that hold on to you. Interior plastics are garbage (ie cup-holder). Add a Recirculate button for the HVAC. Stiffer suspension. Better stereo to compliment the Bose speakers (Factory stereo doesn't do the Bose justice).