I want to install my girlfriends kenwood radio into her 2003 Pontiac sunfire. She doesn't have I star or any upgraded sound system... Yet. But when I went to Best Buy to get the wiring harness and the dash kit they said she needed some $100 module. I wanted to make sure that was true so I called abc warehouse and Mickey shorr. Abc warehouse said that you need it if you don't want to lose your door chimes but didn't know what else it could effect, Mickey shorr seemed pretty confident it only affected the door chimes.
Has anyone done this and do you know if you lose anything else? The guy at best buy said you basically lose any MIL (ABS, Check engine, Fuel, Oil) lights.