RadioPRO Replacement Harness The RP5-GM52-HAR is a special harness meant for use with the RP5-GM51 (sold separately) and replaces the included harness. The harness enables the installation of an aftermarket radio on 2016-2019 General Motors trucks with a 7-inch radio display, including the GMC Sierra and the Chevrolet Silverado. Quick-connect harness for select GM Trucks with 7-inch radio display Compatible with RP5-GM51 (sold separately) to retain; - OnStar Telematics system- Factory WiFi system- Front and rear park assist- All warning chimes (chime module included)- OEM Auxiliary Input- Data controlled outputs for connection to navigation radio; speed, reverse, and E-brake status output wires- Original steering wheel control functions- Data controlled RAP accessory output- Vehicle data-bus intact for service- Updatable using a PAC-UP USB adapter