Venoms Auto Fog Light Harness is designed to fit a wide variety of GM trucks. This harness allows your factory fog lights to automatically activate as soon as your headlights activate, even while your high beams are on.
From the factory, GM disables fog lights when high beams are engaged. This harness overrides that limitation, restoring full fog light functionality for improved visibility in all driving conditions.
Please see the install video listed in the Install video tab below. The install video only covers 2022-2026 Sierra/Silverado 1500 refresh trucks and 2024-2027 Sierra/Silverado HD trucks. Please see the diagrams in the full description for all other trucks listed below.
• 2019+ GMC Sierra 1500 / Chevy Silverado 1500
• 2020+ GMC Sierra HD / Chevy Silverado HD
• 2023+ GMC Canyon / Chevy Colorado
• 2025+ GMC Yukon
• 2025+ Chevy Tahoe/Suburban
$19.99
In stock and ready to ship!
Venom’s Auto Fog lights Harness will allow you to always have your fog lights on anytime the headlights activate, regardless of light settings you have selected from inside the cab. Our harness bypasses GM’s LCM tuning to automatically turn the fog lights on. This means you will never have to turn them on manually again. Automatic high beams are maintained as well.
If you want to wire them up so the fog lights activate when the engine starts, we will show you how to do that as well in the install video below. This will keep your fog lights on even if you activate your high beam headlights. Take your trucks lighting performance to the next level today!
Use Install video listed in the tab below this description.
Use Install video listed in the tab below this description.
Please use this diagram for the Canyon and Colorado.
Please use this diagram for 2025 and newer Yukon, Tahoe, and Suburban.
Please use this diagram for these trucks.
Kit Includes: Jumper harness and T-taps.
2019-2026 GMC/Chevy Auto Fog Lights Harness
All products are backed by Venom’s 1 year free replacement warranty and supported by the best customer support around!
All returns must be made within 30 days of purchase and in new and unused condition and will be subject to a 10% restocking fee. Any damaged or modified equipment will not be returnable and will be shipped back to you.
Please double-check the info below before you pay. Changes after ordering can delay your shipment.
Install is pretty simple. Nice simple mod, and perfect if you’re someone like me that likes to always turn on their fogs.
Was getting very frustrated before i found this module. Super easy to install! And worked wonderfully! Couldnt be happier.
Works great! Instructions are pretty good, however if you want your fog lights to come on with your HEADLIGHTS not your running lights like I did, you’ll use the solid yellow wire instead of the white with yellow stripe.
Easy install, clear instruction and quality material. I do plenty of low voltage wiring, could have easily made these and followed the instructions. I chose to support a small company and it did not disappoint.
Great Up Grade love it