PartsTrend 4" Black Side Step Nerf Bars Runnning Boards Compatible with 1999-2013 Chevy Silverado GMC Sierra 1500/2500/3500 Extended Cab Compatible with: 1999-2013 Chevy Silverado/GMC Sierra 1500 2001-2013 Chevy Silverado/GMC Sierra 2500 3500 2500HD 3500HD (Note: Double/Extended Cab only). 100% brand new 2 nerf bars for both driver & passenger sides, all mounting hardware kit and installation instruction included. Polished to a matte finish making the side running board will never rust. 4 inch side steps are made of heavy duty black powder-coated tube with UV resistant non-slip wide side step pads, providing traction for safe footing. Direct bolt on, no-drill installation for side bars, truly custom fit.