Genuine GM 5978318 High Mount Stop and Cargo Lamp OEM GM Sierra Silverado High Mounted Third Brake Lamp 5978318 2005-2006 Chevy Silverado 1500/2500/1500HD/2500HD 2005-2006 GMC Sierra 1500/2500/1500HD/2500HD 2007 Chevy Silverado 1500/1500HD/2500HD/3500 Classic, 2006 Chevy Silverado / GMC Sierra 3500 Geniune OEM Part.