This replacement HVAC heater hose assembly is engineered to match the fit and durability of the stock heater hose assembly on specified vehicles. It is designed to withstand extreme temperature changes to extend service life. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Chevrolet Silverado 2500 HD Classic: 2007] - [Chevrolet Silverado 2500 HD: 2006, 2007, 2008, 2009, 2010] - [Chevrolet Silverado 3500 Classic: 2007] - [Chevrolet Silverado 3500 HD: 2007, 2008, 2009, 2010] - [Chevrolet Silverado 3500: 2006] - [GMC Sierra 2500 HD Classic: 2007] - [GMC Sierra 2500 HD: 2006, 2007, 2008, 2009, 2010] - [GMC Sierra 3500 Classic: 2007] - [GMC Sierra 3500 HD: 2007, 2008, 2009, 2010] - [GMC Sierra 3500: 2006]