2000 Bonneville and car audio

Can not be done, no interface yet has been made for this type of system for most of the high end GM vehicles.

I took the factory radio out and the only thing that stopped working is the door chimes. If this is the only thing I lose I suppose I could just rewire it my self. It would be a hassle to have to run new speaker wires from the doors and the rear deck. Do you know where the wiring distributer that changes  the ribbon cables to standard wiring for the speakers so that I can tap into them? If I could find that then I would only have to run ground, consant power and ignition power, which would be fairly easy. I have an antenna adapter and mounting kit that work fine. If it comes down to it, I will keep my factory deck and tap my amp and subs into the rear speaker wires.

Not sure where the ribbon cable turns into standard gauge wires ( if at all ). You figured it out........ you may have to just run new wires to each speaker from the deck if you want an aftermarket stereo in your car.