SPYDER Fog Lights 5021427 These fog lights increase visibility during heavy rain, snow, fog and night time driving. They are designed as direct bolt-on replacement parts and are made by an OE approved and ISO certified manufacturers ( SPYDER ) GMC YUKON DENALI 99-06 (NOT FIT XL/SLT)/SIERRA DENALI 02-06/GMC SIERR Halo Projector Fog Lights w/Switch - Smoke FogLightAssembly