Nfab N-Durastep Nerf Step, with Bed Access NDC15104CC-6 Bed AccessSold As: Pair CHEVROLET GMC SIERRA 2500 HD SIERRA 3500 HD SILVERADO 2500 HD SILVERADO 3500 HD BASE DENALI HIGH COUNTRY LT LTZ SLE SLT WT 2015 2016 6.6L Duramax Turbo Diesel LML (400) 6L GEN IV CNG LC8 Vortec (364) 6L GEN IV Flex L96 Vortec (364) 6L GEN IV Flex LC8 Vortec (364) 6L GEN IV L96 Vortec (364) 6L GEN IV LC8 Vortec (364) CNG DIESEL FLEX GAS Nfab N-FAB N-Durastep Bed Access Nerf Step Bar (Black) - NDC15104CC-6 NDC15104CC-6 Nerf/Step Bar Wheel to Wheel