Westin Ultimate Bull Bar Bumper Bull Bar 32-2325 Fits 2011 to 2013 Chevy Silverado 2500HD/3500;Fits 2011 to 2013 GMC Sierra 2500HD/3500;3 in. Dia.; Black Steel; w/Stainless Steel Skid Plate CHEVROLET GMC SIERRA 2500 HD SIERRA 3500 HD SILVERADO 2500 HD SILVERADO 3500 HD DENALI LT LTZ SLE SLT WT 2011 2012 2013 2014 6.6L Duramax Turbo Diesel LGH (403) 6.6L Duramax Turbo Diesel LML (400) 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) 6L GEN IV LC8 Vortec (364) CNG DIESEL FLEX GAS Westin Westin Ultimate Bull Bar - 32-2325 32-2325 Bumper Guard