I recently had to change the OEM alternator on my 2001 Pontiac Grand
Prix GTP. I'm sure most of you could swap an alternator out in your
sleep but I took pictures of the process and wrote up a quick guide
for the new owners.
The procedure should be very similar on every car that has the GM 3800
Series II engine.
Here's the guide -
http://www.paulstravelpictures.com/Pontiac-Grand-Prix-GM-3800-II-Alternator-Replacement-Guide/index.html
Cheers,
Paul Michaels
Ft. Lauderdale, FL