Nfab AdjustSTEP Truck Step, Wheel to Wheel ASC15113CC Fits 2015 Chevy / GMC 2500 and 3500 Crew Cab with Long Bed;Finish: Textured Matte Black Powder-coat;4-Step with Optional Bed Access Step Part Number N/FASU001;465 Pound Weight Rating CHEVROLET GMC SIERRA 3500 HD SILVERADO 3500 HD BASE DENALI 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 L96 Vortec (364) 6L GEN IV LC8 Vortec (364) CNG DIESEL FLEX GAS Nfab N-FAB AdjustSTEP Truck Steps (Textured Black) - ASC15113CC ASC15113CC Nerf/Step Bar Wheel to Wheel