Retrofitting Projector Headlights with LED Bulbs for GMC Sierra biiut.com

The retrofit process is labor-intensive but rewarding. Begin by removing your Sierra’s headlight assemblies and preheating your oven to approximately 200 to 250 degrees Fahrenheit. Place each housing in the oven for 8 to 10 minutes to soften the factory permaseal adhesive. Carefully separate the lens from the housing using screwdrivers or trim removal tools. Remove the old reflector bowl by drilling out rivets or unbolting mounting points. Install the new projector using the included brackets or by creating custom mounts. Ensure the projector sits perfectly horizontal—a rotated projector will cast a crooked beam pattern that cannot be corrected by adjustment. Close the housing with fresh butyl rubber sealant and bake again to soften the adhesive, then clamp until fully cooled.