PAC C2R-GM11B Radio Replacement Interface (2005-2006 Cobalt, 2004-2007 Malibu, 2005-2007 G6 No OnStar(R)) Replicates factory warning chimes & provides a databus generated 12V accessory power output that is fully compatible with the GM(R) RAP system which keeps the radio powered after key-off Issues data commands that maintain a health system status to other vehicle's systems; Retains all warning chimes including backup chimes, memory seats, low fuel, door/hatch ajar & others; Includes +12V accessory wire; Retains RAP system when key is turned off--radio stays on for approximately 10 min or until the door is opened; Supplied wire harness to connect aftermarket stereo to factory speakers; Will work in vehicle that has the factory Bose(R) amp removed or bypassed--custom wiring is required; Buzzer is built into the interface; For non-OnStar(R) 2005-2006 Chevrolet(R) Cobalt, 2004-2007 Malibu, 2005-2007 Pontiac(R) G6