Description

The Trail Bright Stack is a clever plug-and-play module designed specifically for the Hummer H3 & H3T, but possibly also the Canyon Colorado trucks, that lets you run both fog lights and high beams simultaneously, or low beams and high beams together. This gives you significantly more forward illumination during night off-roading, rock crawling, technical trails, or any low-visibility situation where maximum light output is critical. It’s especially useful when you need every bit of light possible without having to constantly flip between beam settings.

Note that when using BeamTech LED headlight bulbs, running low beams + high beams at the same time provides almost no noticeable additional light output due to the way these LEDs are designed. The Trail Bright Stack is soon to be in testing and is expected to be in stock by April 2026. You can backorder now to secure your unit and have it ship as soon as the first production batch is ready.

Installation is straightforward and takes just a few minutes with no cutting, splicing, or permanent modifications required. Simply remove relays 70 and 69 from the underhood fuse box, insert both relays into the Trail Bright Stack printed circuit board, then reinstall the relays into the PCB. Relay 69 can be inserted in either direction with no polarity concerns. Two small DIP switches on the PCB allow you to independently enable (or disable) the fog + high beam function and the low + high beam function exactly as you prefer.

This module gives you flexible control over your lighting setup while keeping everything clean and reversible. If you frequently drive off-road at night or want the option for maximum brightness on demand, the Trail Bright Stack is a must-have upgrade for your H3.