Gmc Sierra Yukon Xl 99 00 01 02 03 04 05 06 Fog Light Matrix Fog Lights offer a stylish way to improve your safety by increasing your car's visibility at night and in poor weather. Special coating on the lens surface prevents hazing and fading, ensuring proper illumination and operational safety Matrix Fog Lights are vigorously tested in a rain-resistant tester and a thermo hygrometer to ensure perfection Matrix Fog Lights are DOT- and SAE-approved to FMVSS no. 108, and manufactured in an ISO 9002 and QS 9000 quality certified factory Matrix Fog Lights are completely street-legal, and are backed by a thirty days warranty from manufacturers defects