I have been bothered by the light output on my 2015 GMC 2500 since I purchased it. The problem became much worse when I had the windows tinted (including the windshield.) I saw a post from a Facebook group about LED bulbs and I started researching them. There is piles of people that apparently make them. I ended up going with Diesel LEDS due to the company having a easy to use website, being based in North Carolina and there responsive customer service to email questions. The parts fit perfectly into my truck. I replaced the main headlight bulbs, fog bulb and reverse bulbs. The improvement is astronomical. I cant say enough positive things about the bulbs. They are insanely bright. Forward and reverse, I can see it all. Automakers should put these bulbs in stock. Its ridiculous that you have to upgrade your vehicle lighting from factory, just to be able to safely see. Word to the wise, make sure you headlamps are aimed correctly, you can easily blind oncoming vehicles if your headlamp beam pattern is too high.