Feature Application : 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Duramax Engines. Replacement : Everything to install/replace your engine oil cooler, replace for part number of 10263 . Feature : An easy way to test the oil cooler is to remove the oil filter and pressure test the cooling system. Package Included : Includes the Outlet Gasket, Inlet Gasket, and Oil Cooler Seal in case your cooler is apart. .