They sold me one of those for my 03 s-10 and I have the chimes and all that still with that but the thing made it to where my stereo doesnt come on when you turn the key back to acc. It doesnt stay on after you shut off the ignition either which I liked having.

Oh and the Bose system uses RCAs. I guess if you use regular speaker wire you just cut the ends off. I used all RCAs off the deck to my amp so I just left them on.