I'm going to help my buddy install an aftermarket system in his monte, its going to consist of a 4ch amp for components and 2 rear fillers and a SQ sub. The thing is his car has a 8 speaker premium package or something like that and I'm wondering how they are wired. My Grand prix is about the same interior space and I only have 4 speakers...how would I go about installing an aftermarket stereo?

Thanks.

 

I removed the factory bose amp from my 92 z and installed all new wiring, basically any wiring that was used for the factory system wasent re-used, i spent a bit of time trying to locate factory speaker wire but i wound up running new (gave up) better off anyways.
I installed 5.1/4 in doors and 6x9s fit in the back. Couldn't use the factory speakers at all cause they were like 1 ohm or something stupid like that, they were crusty anyways lol. Hope that helped a bit?

 

Did you leave the original 4 left in the car?

 

If your buddy's Monte has the Bose system you will be better off doing the same thing - replace the deck and speakers at the same time and run all new wiring. Don't try to reuse the Bose amp.

 

Not sure what you mean? but i took out all stereo that came stock so hope that answers the question