High-current 10A accessory output; Data-controlled outputs for connection to navigation radio--speed, reverse & E-brake status output wires; Retains factory-installed amp (if equipped); Data-controlled RAP accessory output; Keeps vehicle databus intact for service; Plug-in connection for steering wheel control module (SWI-RC or SWI-X); Adjustable chime volume: 4 levels & off; Interface can be quickly updated if needed from PAC(R) website using PAC-UP USB adapter; Includes RadioPro3 module, plug & play vehicle connection harness & instruction manual; For GM(R) vehicles with Class II databus & 24-pin harness;