tail light wiring diagram - GM-Trucks My son bought a 2017 Silverware and wanted a set of lighted step Inserts for a gift. We bought them for him and trying to wire them. They have led lights for running, reverse and braking. Before I cut into wiring harness I see three wires to each of the tail light bulbs. the wire colors don't match the step lights wiring. WIRING BRAKE, TAIL LIGHTS AND TURN SIGNALS FROM SCRATCH Click to view on Bing12:44WIRING BRAKE, TAIL LIGHTS AND TURN SIGNALS FROM SCRATCH PART 2 Garageless. Loading Tail light, Brake/Turn-Signal Light & Reverse Light 1997 Chevy Silverado - Duration: 18:35.Author: GaragelessViews: 31K Nbs Taillight Wiring - gm-trucks Sounds like they wired the High Mount light directly off of the left taillight. That would explain why it does exactly what the left light does (brake and blinker) And that would be no fault of GM, just someone taking the easy way out in wiring the camper. WIRING DIAGRAMS Repair Guide - AutoZone AutoZone Repair Guide for your Chassis Electrical Wiring Diagrams Wiring Diagrams GMC Tail Light Wiring Harness | Auto Parts Warehouse We offer a wide range of GMC Tail Light Wiring Harnesss of all the best brands in the industry at an affordable rate that fits the Price Range you are looking for. Shop with us at wholesale prices and get free shipping over $50. We have over lots of customer reviews on GMC Tail Light Wiring Harness to help you find exactly what you need.