About this item Replacement for 10263 Oil Cooler install Kit Replacement for 2001-2010 GM Duramax 2500 and 3500 HD Silverado – Sierra 6.6 V8 Diesel Trucks Include outlet gasket, inlet gasket and oil cooler Seal. Made of rubber material, it helps maintain good engine performance. Help install a new or reinstall your oil cooler to the engine