Radio replacement interface ^^ Retains chime function ^^ Outputs for navigation radio functions ^^ Interface can be quickly updated if needed from PAC website using PAC-UP USB adapter ^^ RadioPro5 interface for 2014 Chevrolet Silverado 1500 & 2014 GMC Sierra 1500 with 29-bit GM LAN V2 databus with 20-pin & 16-pin harnesses ^^ Retains OnStar telematics system / retains front and rear park assist ^^ Data controlled outputs for connection to your navigation radio; speed, reverse and e-brake status output wires ^^ Retains original steering wheel control functions with the new radio with no additional interface or programming needed ^^ Data controlled rap accessory output ^^ Interface can be quickly updated if needed from the PAC website using a PAC-UP USB adapter