Combo Kit for Aftermarket Radio Installation in Factory Radio Location. Black color radio kit. Use to add an aftermarket radio to the factory vehicle wiring.. Standard wire coloring usually will connect color for color to aftermarket radio's wire harness. Designed specifically for the installation of Single or Double DIN radios. High-grade ABS plastic. Antenna adapter used to retain radio reception. Important Compatibility Notes: Will require a separate connection of the red 12 volt ignition wire to the new radio wire harness since the factory radio harness doesn't have it. This harness only works with regular factory audio systems- if the factory audio system is premium system like Infinity, Bose, Boston Acoustics, etc. then this harness is not compatible. Will not retain factory steering wheel audio controls- extra adapters required. Some off-size radios will require modify kit which is normal. Compatible Vehicles: Made for Chevrolet: 2014 Silverado 1500 only; 2015-2018 Silverado 1500, 2500, 3500; Made for GMC: 2014 Sierra 1500 only; 2015 2016 2017 2018 Sierra 1500, 2500, 3500