Go to the auto parts store and buy the Haynes or Chilton tear down guide for that model. If you're a do it your selfer with a car that old you need one.
In order to replace the electric window motors on a Pontiac Grand Prix you will need to unscrew the Torx screws on the door, life it back to remove the plastic pieces. Remove all connectors, and the plastic covers.
You will have to replace the regulator assembly.
How do you replace starter on2.3 cy 1991 pontiac grand am
If it looks the same it will probably work.
how do I replace water pump 2000 Pontiac Grand AM SE1?
how to replace lifters on a 03 grand am
how do i replace a water hose in 1993 pontiac grand am
At the Pontiac dealership or eBay just type in Pontiac sash
change front coil spring on 2000 Pontiac grand am
with a window crank removal tool.
how do you replace backup lights on 99 grand am?
http://www.a1electric.com/grandam.htm here is an excellent how to with pictures