Anzo USA 311089 GMC Sierra HD Red/Clear LED Tail Light Assembly - (Sold in Pairs) Easy to install - directly replaces factory lenses Thermo-Hygrometer (temperature and humidity chamber) and Rain-Resistant tested SAE (Society of Automotive Engineers) and D.O.T. (Department of Transportation) compliant with FMVSS (Federal Motor Vehicle Safety Standarts) No. 108. Provides clean and great match for hi-tech Euro style