2014-2019 GMC Sierra Add-On Power Harness for Grille Lights and Other 12-Volt Accessories

Installing aftermarket lighting or other 12-volt accessories on your GMC truck has never been easier with LEDGlow’s Add-On Power Harness for 2014–2019 GMC Sierra 2500 and 3500 models. The convenient Plug and Play wiring design gives you a reliable way to power motorsports lighting or other 12-volt devices without cutting, splicing or modifying factory wiring.

The 36-inch pass-through harness features two easy-to-use connectors. One plugs directly into the back of the driver’s side headlight, and the other connects to the truck’s factory wiring harness. Once installed, the harness uses your running lights as a trigger to automatically power your connected accessories whenever the running lights are on. This seamless Plug and Play setup keeps your truck’s wiring intact while delivering a clean, professional installation that saves time and effort.

Whether you’re powering LED underbody lights, grille lights, or other accent lighting, this harness delivers a quick, safe, and efficient power source. For higher-draw accessories like larger light bars, simply pair the harness with a relay to ensure proper power delivery directly from the battery. That’ll maintain steady and consistent power.

Like all of our products, this add-on harness is backed by the LEDGlow Guarantee, which includes Free Lifetime Tech Support and a One Year Limited Warranty. Each wiring harness also comes with detailed installation instructions to help you get started right away.

With this Add-On Power Harness, you can take your Sierra’s lighting setup to the next level. Avoid complex wiring and achieve a clean, factory-style installation that enhances your truck’s lighting system while protecting the factory electrical setup.