AMP Research 1999-2006 Chevy/GMC Silverado/Sierra Extended/Crew PowerStep - Black1999 2005 Chevrolet Silverado 1500 Base Extended Cab Pickup, 2004 2006 Chevrolet Silverado 1500 Hybrid Extended Cab Pickup, 2004 2006 Chevrolet Silverado 1500 LS Crew Cab Pickup, 1999 2006 Chevrolet Silverado 1500 LS Extended Cab Pickup, 2004 2006 Chevrolet Silverado 1500 LT Crew Cab Pickup, 1999 2006 Chevrolet Silverado 1500 LT Extended Cab Pickup, 2003 2006 Chevrolet Silverado 1500 SS Extended Cab Pickup, 2003 2004 Chevrolet Silverado 1500 WT