ACDelco GM Original Equipment Tail Light Harnesses are organized sets of wires, terminals, and connectors that run throughout your entire vehicle, and are GM-recommended replacements for your vehicle's original components. These harnesses relay information and electrical power to your vehicle's tail lights, brake lights, and turn signals. These original equipment tail light harnesses have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.