the 01 malibu's have their door chime run through the stock h/u. So you must buy a harness either to connect the stock h/u in the trunk or glove box or option 2 is to buy an adapter thing that lets it go through ur aftermarket. My friend bought the 2nd one and we tried hooking up his pioneer deh-p8mp last night and it woudn't turn on. I have a volt tester and tested thepower, and ACC all had power and checked the ground but still nothing from the headunit. Any ideas fellas?