If you already have an aftermarket headunit, you could just wire into it. The problem is going to be that the bose system runs 4 speaker outputs out back and two up front. So you will either have to remove the midbass, remove the loudspeaker, or run them in parellel to your decks rear output. I'm pretty certain the rear speakers run at 8 ohms out back so parralel would be okay, but let me head out to my shop here in the next day or two and check and see if mine are 8 ohm or 4 ohm i still have them sitting out in a tub of the old stuff that used to be in my grand prix, if you wanna see what it all looks like I have a build log up on DIYmobileaudio.com under the same Deathjunior name and you can check out the rear deck. The build for that part isn't fully done but you can atleast see some photos of the bose package and its speakers. I'm gonna be pulling my amp and replacing it with 3.
