Upgrade the white DRLs in your 2024+ GMC Sierra HD truck to switchback amber/white DRLs OR FULL-TIME AMBER with the plug and play amber LED DRL headlight harness. ADD ON THE AUTO-ON HARNESS FOR THE FENDER, MIRROR, AND CAB LIGHTS SO THEY ALL TURN ON WITH THE DRLS! Installation is as simple as plugging into the back of the headlight, then into the factory headlight harness and retains all factory options. Switchback - During daylight with your automatic headlight controller set to AUTO, the daytime running lights will be amber. At night the running lights will switch back to white automatically to match the headlights and/or fog lights or any other time the parking lights are turned on. You can also manually control your DRLs during the day with the automatic headlight controller. Turning it clockwise to the parking light setting will turn your DRLs white again. We recommend just leaving the knob in the auto position and let the truck do the work for you. With this kit you will maintain sequential turn signals that your truck came factory with.

NEW: ADD ON THE AUTO-ON HARNESS FOR THE FENDER, MIRROR, AND CAB LIGHTS SO THEY ALL TURN ON WITH THE DRLS! This will allow all your factory lights to turn on automatically when the DRLs are turned on (unlock, lock, on, driving, etc). Includes a Jumper harness for the mirrors/cabs and one for the fender lights.