During some spirited driving recently, I heard half of my serpentine
belt rip off and rattle around the engine bay.

Luckily half of it stayed intact so I was able to go pick up a new
belt and get back home without it disintegrating completely.

I took pictures of the replacement procedure and created a quick
guide. The total cost was about $40 for the new belt and I also
replaced two tensioner/idler pulleys that didn't spin freely.

Here's the guide - http://www.paulstravelpictures.com/GM-Pontiac-Grand-Prix-Serpentine-Belt-Replacement-Guide

Cheers,
Paul Michaels
Fort Lauderdale, FL