This automatic transmission oil cooler is designed to match the function of an original cooler on specified vehicles. It is engineered to help maintain proper engine oil temperature when an original cooler has failed from heat, corrosion, or damage. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Chevrolet C4500 Kodiak: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [Chevrolet C5500 Kodiak: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [Chevrolet C6500 Kodiak: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [Chevrolet C7500 Kodiak: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [Chevrolet C8500 Kodiak: 2004, 2005, 2006, 2007, 2008, 2009] - [Chevrolet C8500: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [Chevrolet Kodiak C8500: 2004, 2005, 2006, 2007, 2008, 2009] - [GMC C4500 Topkick: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [GMC C5500 Topkick: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [GMC C6500 Topkick: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [GMC C7500 Topkick: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [GMC C8500 Topkick: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [GMC C8500: 2003, 2004, 2005, 2006, 2007, 2008, 2009] - [GMC Topkick C8500: 2003, 2004, 2005, 2006, 2007, 2008, 2009]