I just spent most of last Sunday replacing the brake pads on all four wheels of my 2001 Pontiac Grand Prix GTP. I also bled the brake lines since the brakes were exhibiting a lot of "fade" during heavy stops.
These are fairly simple procedures if you have some basic automotive know how.
The brake pads were $47 for the front two wheels and $31 for the rear wheels. The brake fluid, brake cleaner and anti-squeal gel added another $20 to the total cost.
Here are the guides below.
Front Brake Pads -
Cheers, Paul Michaels Ft. Lauderdale, FL