I just replaced one of the bulbs in a tail light on my 2001 Pontiac Grand Prix GTP sedan. While I was doing it, I took pictures of the process to create a quick guide.
Owners of other sixth generation (1997 to 2003) Grand Prix cars should also find it to be useful.
Here's the guide -
formatting link
Cheers, Paul Michaels Ft. Lauderdale, FL