Shop Nilight Running Boards for 2007-2018 Chevy Silverado/GMC Sierra 1500 Double Extended Cab 2007-2019 Chevy Silverado/GMC Sierra 2500HD 3500HD 6 Inch Aluminum Side Step Nerf Bars in high quality, support 2 Years Warranty. Made from Stainless Steel and pre-treated with rust-resistant powder coatings. One-piece design ensures excellent performance and looks for years to come.