PAC RP4-GM11 Radiopro4 Stereo Replacement Interface with Steering Wheel Controls for Select GM Vehicles Radiopro4 Stereo Replacement Interface with Steering Wheel Controls for Select GM Vehicles Data controlled accessory and navigation outputs Built in pre-programmed Steering Wheel Control Retention retention Retains factory amplifier (standard & premium) Retains Rear Seat Controls (most vehicles)