The GMOS-100 is a GM solution to add an aftermarket radio into GM vehicles with the CLASS II GMLAN 11 or GMLAN 29 bit data systems. Weather the vehicle is amplifi ed or non-amplifi ed equipped with satellite radio Onstar Bluetooth or steering wheel controls the GMOS-100 can retain it. All the warning chimes and convenience features are retained that are normally lost when the OEM radio is removed. The GMOS-100 also provides a 12 volt 10 amp accessory output and outputs to help install a navigation radio which include VSS Parking Brake and Reverse.