Fitment: 2011-2014 Chevrolet Silverado 2500 2011-2014 Chevrolet Silverado 3500 2011-2014 GMC Sierra 2500 2011-2014 GMC Sierra 3500 Note:Turbocharged only Features & Benefits: Larger working surface provides cooler running and longer life expectancy Thicker body and deep finned faceplate dissipate more heat Uses a better quality bearing than Standard Duty and Heavy Duty designs 100% performance and durability tested Enhanced fin design for maximum heat dissipation .