Nfab N-Durastep Nerf Step Bar, Wheel to Wheel NDC1189QC Fits 2011 to 2013 Chevy and GMC 1500, 2500 and 3500 Quad Cab; With 6.6' Bed; N-Durastep Finish: Black Powder Coated; Number of Steps: 4; Bar Diameter: 3; Length Modular: Welded One Piece Construction; Body Lift Compatibility: Yes; Weight Rating: 445; So CHEVROLET GMC SIERRA 1500 SIERRA 2500 HD SILVERADO 1500 SILVERADO 2500 HD SILVERADO 3500 HD LS LT LTZ SL SLE SLT WT 2011 2012 2013 4.3L (262) Vortec 4.3L LU3 (262) Vortec 4.3L LU3 (4293cc) Vortec 4.8L GEN IV Flex L20 Vortec (294) 5.3L GEN IV Flex LC9 Vortec (325) 5.3L GEN IV Flex LMG Vortec (325) 6.2L Flex L9H (376) 6.6L Duramax Turbo Diesel LGH (403) 6.6L Duramax Turbo Diesel LML (403) 6L GEN IV CNG LC8 Vortec (364) 6L GEN IV Flex L96 Vortec (364) 6L GEN IV L96 Vortec (364) CNG DIESEL FLEX GAS Nfab N-FAB N-Durastep Wheel To Wheel Nerf Steps (Black) - NDC1189QC NDC1189QC Nerf/Step Bar Wheel to Wheel