You have to put down your rear seats and then take the plastic covering off. It's really easy, although you will feel like you are breaking something. Just pull on those little plastic clips and they will pop out. After that, you have to take the piece off that is over the speakers. Not the grills, but the entire back window piece. After that it's easy. The speakers pop out (they are cliped, not screwed in). From here it's pretty explainatory.
If you need any more help with your Grand Am, check out the forum on this site, it's helped me a lot:
http://www.gaownersclub.com/
Also, if you need any more help, feel free to ask
