GM Extension harness Used to install an aftermarket car stereo and bypass factory amplifier without cutting stock connections Includes plug for power, ground, speaker, center channel and subwoofer connections 72' Long leads for amplifier bypass Bypass Harness is plugged in at the factory M.O.S.T. Amplifier and ran to the location of the aftermarket radio or the aftermarket amplifier Allows for the installation of an aftermarket radio using the existing factory wiring and connectors ABS plastic for maximum reliability Factory OEM quality Makes replacing the factory car stereo wiring very easy No cutting of factory wiring needed