CAREPAIR 4" Oval Black Carbon Steel Side Step Rails Nerf Bar Running Boards Fit 2001-2013 Chevy Silverado/GMC Sierra Crew Cab(w/ 4 Full Size Doors) Fitment: * 2001-2013 Chevy Silverado/GMC Sierra 1500/1500 HD/2500/2500 HD/3500/3500 HD Crew Cab With 4 Full Size Doors Only Item-offered: 2pcs 4" Oval Carbon Steel Side Step Nerf Bars With Rubber Caps + Brackets + Necessary Mounting Hardware + Installation Instruction Installation-type: Mount To The Frame Surface-finish: Black Powder Coated Material: Made From Heavy Duty Carbon Steel