Shop Nilight Running Boards for 2019-2024 Chevy Silverado/GMC Sierra 1500 Crew Cab 2020-2024 Silverado/GMC Sierra 2500HD 3500HD 6 Inch Aluminum Bolt-on Side Step Nerf Bars, in high quality, support 2 Years Warranty. Premium two stage textured black power coat finish offers exceptional rust and corrosion resistance, made by 2mm thickness heavy duty mild steel, proven to handle up to 450 LBS each side.