Here are the Crutchfield MasterSheet instructions for the 99 GrandAm. I read these over and they look to be pretty much the same as for the Alero (would make sense since they're pretty much the same car). I found them from someone on the Grandamgt forum who had posted them and thought I would share them with everyone here
They're about 112kb a piece so I posted them on my website.
Good Luck :thumbsup:
http://home.cwru.edu/~nkp2/mastersheet.htm