Tyger Step for 2007-2018 Silverado/Sierra 1500 Extended, 2007-2019 Silverado/Sierra 2500/3500HD Extended Cab (4.75" Wide & 79" Long | Running Boards | Side Step Rails | Nerf Bars) IMPORTANT: IMPORTANT: Only fit Extended Cab with 2 full-size front doors & 2 suicided rear doors. Not for Crew Cab with 4 full-size doors. (Please check the Cab Size picture.) 100% new running board kit includes both driver & passenger sides. TYGER STEP boards are made of corrosion proof extruded aluminum with 4.75 inch wide step area. Black anodized aluminum with silver trims for a neat cusomized look! Easy bolt-on installation. No drilling. All mounting hardware and DIY instruction included. TYGER No-Hassle 5 Year warranty!