AnzoUSA 531066 Chrome LED Third Brake Light for Chevrolet Silverado/GMC Easy to install - directly replaces factory lenses Thermo-Hygrometer (temperature and humidity chamber) and Rain-Resistant tested SAE (Society of Automotive Engineers) and DOT (Department of Transportation) compliant with FMVSS (Federal Motor Vehicle Safety Standards) Number 108 Provides clean and great match for hi-tech Euro style