This harness is intended to allow the use of 2024-26 FULL LED tail lights found on the 2500 3500 trucks to be used on a 2019–2026 GMC OR CHEVROLET 1500– 3500 halogen or 6pin LED equipped truck. WHILE THIS HARNESS IS 95% PLUG-IN PLAY, THERE ARE TWO WIRES THAT HAVE TO BE TAPPED.
