FITMENT Running Boards Compatible with 20072018 Chevy SilveradoGMC Sierra 1500 Crew Cab, 20072019 SilveradoSierra 2500HD 3500HD Crew Cab, 2019 Silverado 1500 LD Crew Cab, 2019 Sierra 1500 Limited Crew Cab 4 fullsize doors. NOTE Not Suitable For 2007 Silverado 1500 Classic or All the Diesel Engine Models. If You Accidentally Bought The Wrong Model, Please Keep In Touch with Us And We Will Reissue The Correct Bracket For You Without Returning The Product. MATERIAL Running boards for Silverado Crew Cab,Made with Stainless Steel And Antislip Plastic Steps. 6inch Wide Step, Offer A Secure Footing From Which You Can Step Up Into Your Truck. INNOVATIVE DESIGN This Product Is Newly Designed And Has Obtained A Patent In The Us. Slider Design, Able To Adjust Position On Vehicle Forward and Backwards For Better Customization OE STYLE NonWelded Design Of Product, There Are Four Brackets with Plastic Covers On Each Side. Nice To Get Inout Of The Truck. EASY TO INSTALL Just Mounted It, Direct BoltOn, No Need To Drill. And Also Each Bar Can Support Up To 500 LBS.