Nfab N-Durastep Nerf Step, with Bed Access NDC01115CC-6 Bed Access CHEVROLET GMC SIERRA 1500 SIERRA 1500 CLASSIC SIERRA 2500 SIERRA 2500 HD SIERRA 2500 HD CLASSIC SIERRA 3500 SIERRA 3500 CLASSIC SILVERADO 1500 SILVERADO 1500 CLASSIC SILVERADO 2500 SILVERADO 2500 HD SILVERADO 2500 HD CLASSIC SILVERADO 3500 SILVERADO 3500 CLASSIC BASE CLASSIC LS CLASSIC LT CLASSIC SL CLASSIC SLE CLASSIC SLT CLASSIC WT LS LT SL SLE SLT WT 2001 2002 2003 2004 2005 2006 2007 4.3L (262) Vortec 4.3L LU3 (262) Vortec 4.8L GEN III LR4 Vortec (294) 5.3L GEN III Flex L59 Vortec (325) 5.3L GEN III L33 Vortec (325) 5.3L GEN III LM7 Vortec (325) 6.6L Duramax Turbo Diesel LB7 (403) 6.6L Duramax Turbo Diesel LBZ (403) 6.6L Duramax Turbo Diesel LLY (403) 6L GEN III Bi-Fuel LQ4 Vortec (364) 6L GEN III CNG LQ4 Vortec (364) 6L GEN III LQ4 Vortec (364) 6L GEN III LQ9 HO Vortec (364) 8.1L L18 Vortec (496) BI-FUEL CNG DIESEL FLEX GAS Nfab N-FAB N-Durastep Bed Access Nerf Step Bars (Black) - NDC01115CC-6 NDC01115CC-6 Nerf/Step Bar Wheel to Wheel