Morimoto's XB LED Sidemarkers for GMC Sierra HD trucks. These sidemarkers are the ultimate upgrade for your vehicle's lighting system. They outshine the competition with high-powered Osram LED technology, ensuring optimal brightness day and night, and matching perfectly with your upgraded headlights, fog lights, and tail lights. Durability is key with a UV-coated polycarbonate lens that resists fading, ensuring a long-lasting, like-new appearance for years to come. Installation is a breeze with a plug-and-play design that connects seamlessly to factory connectors, eliminating error codes, flickering, and radio interference. Plus, they won't void your factory warranty. Morimoto's commitment to quality shines through with their superior fit and finish, making these sidemarkers the top choice for discerning vehicle owners. Upgrade to Morimoto XB LED Sidemarkers and experience the difference for yourself.