Thanks for the input everyone, I appreciate it. I'm fairly confident it does not have the monsoon system in it, the head unit looked like a classic gm unit to me so I'm going to assume its the boss or other factory system. I also swung by a shop yesterday, their opinion was that it was the amp, looked it up and found there was no amp on the 2000 grand prix gt. I looked in the trunk but did not see an amp, where would it be visible from if there was one? I'll look up behind the glove box tomorrow when it's warm. I'm eager to get this radio working but I will probably replace the entire factory system, wiring and all in the spring. I'm probably going to do something with the brakes as well as we are already having trouble with them. I'll see which system I have in the morning and check from there. I believe it does not have a factory amplifier but I could certainly be mistaken. I will check behind the glove box and in the trunk again, should they both be easily visible or will I have to remove something to see either amp? After I check out the amps I'll check the harness and see if its the culprit.
