MaxMate Stainless Steel 6" Extra Wide Side Step Running Boards For 1999-2013 Silverado/Sierra 1500/2500LD EXT Cab; 2001-2014 Silverado/Sierra 2500HD/3500 EXT Cab (Excl. C/K Classic) 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 image above).; 100% brand new 2 bars for both driver & passenger sides. All mounting hardware and DIY instruction included.; Step bars are made of heavy duty Marine-Grade stainless steel 6 inch oval tubing rust resistant! UV resistant non-slip extra wide step pads.; Easy No-Drilling DIY installation in minutes.; Lifetime warranty