A ruggedly constructed circuit board to fit the engine-bay fuse box of your 99-02 Silverado, Sierra, Tahoe, Yukon, Suburban, Denali/C3 and Avalanche. This board can be installed in 10 minutes with minimal tools, and allows for upgraded lighting on your Truck/SUV.
After installation, your High Beam Headlights will command the Low Beams to stay on, as well as activating the Fog Lights. With the dual-mode switch built into the board, you can also choose whether your DRL (Daytime Running Lights) also turn on with the High Beams, in Mode 1. Or the simple slide of the switch into Mode 2, you can have your DRL come on whenever the Parking/Running lights are on.
The circuit board does not affect any of the stock functions, and DRL will still be active when in Gear and Daylight. Your automatic headlights will not be affected either.
Be aware, some states laws may be difficult to understand and be "shady" about the amount of lighting devices active at one time. You are responsible for checking this and obeying traffic laws. This device is intended for off-road use only.