Fog lights on w/ High Beams, New GM trucks

01tundra wrote:
I installed this kit on our 2017 GMC 2500HD, works great. It installs on one of the plugs inside the cab.

Allows you to use the fog lights on either low or high beam, fog light switch still functions as designed. So the fog lights only come on if you choose to hit the factory switch. All this kit does is prevents the fog lights from being automatically switched off when switching from low to high beam "if" you have the fog lights turned on.

After install your lights will function as follows:

Low Beams Only- Only Low Beams will be on
Fog Lights Only- Only Fog Lights will be on
Low Beams & Fogs- Only Low Beams & Fogs will be on
High Beams- Low Beams, Fog Lights, & High Beams will all be on (GM by default normally turns off the fogs when in high beam, but this kit solves that)

Running the fog lights with high beam in rural areas such as ours really helps....and before anyone wants to lecture me on how it's illegal because you could blind oncoming vehicles, I'm not of of the jacka$$e$ who approaches oncoming vehicles with my high beams on so it's a non-issue.

https://boostautoparts.com/products/6hi

one of my complaints about high beams on cars is that it usually reduces near field side visibility. It's a great mod and can either be done with the boost auto parts or using an appropriate diode.

Another good mod on earlier GM vehicles with quad headlights is to keep the low beams on with the high beams. Many cars do this, it is perfectly legal in all states. For some reason some quad headlight GM vehicles turn off the low beam with high beam on. My 04 silverado did that and I modified it so the low beams stayed on.