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 20% 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.
This harness makes the fog light exactly how they should work from the factory!!
Easy install
Amazing!
Very happy with it.
Installed in my 2026 Sierra 1500 AT4, and with a little help afterwards (thanks for the tech assistance!) it works well and as described. I used the “on with lowbeams” option for night use and now I don’t have to switch the fogs on every drive cycle, GM should have done this from the start. I’m not a fan of the ‘scotchlock’ type taps, but they do work and are fairly simple to clamp on. 4 stars because of the cheap taps, but I do understand Venom wants them to be simple for most people to install.