My wife just bought a 2005 Grand Prix, base model with the 3.8. Everything checks out good, and it runs great. One minor problem is that the parking brake doesn't hold. I've checked the pads (via looking through the wheel) and there's plenty of material there. The parking brake pedal in the car feels good, and doesn't bottom out. So I go under the car and the rear calipers have the cable attached to them, a.k.a. combined caliper/parking brake unit, and I tried adjusting the cable. Still won't hold. I went to a few parts websites and some show parking brake shoes. That doesn't make sense based on the calipers I have. I know the easiest, sure-fire way to tell is to pull the wheel...but I was wondering if anyone here has any input. Thanks.