Perfect Fit: Direct fit for 2014-2018 Silverado Sierra 1500 2015-2019 Silverado Sierra 2500 3500 Standard Cab (Incl. Diesel) Constructed of 4", 5" or 6" oval tubing with 4" wide injection molded polymer step pads Protects vehicle rocker panels from potential damage Steel construction with 30 degree factory style bends at each fully-welded dome end Bolt-on installation and mount kit included - no drilling required on most applications