Nfab AdjustSTEP Truck Step, Wheel to Wheel ASC11100CC Textured Black CHEVROLET GMC SIERRA 2500 HD SIERRA 3500 HD SILVERADO 2500 HD SILVERADO 3500 HD DENALI LT LTZ SLE SLT WT 2011 2012 2013 2014 6L GEN IV CNG LC8 Vortec (364) 6L GEN IV Flex L96 Vortec (364) 6L GEN IV L96 Vortec (364) 6L GEN IV LC8 Vortec (364) CNG FLEX GAS Nfab N-FAB AdustSTEP Truck Steps (Textured Black) - ASC11100CC ASC11100CC Nerf/Step Bar Wheel to Wheel