Reseal the engine in your 2001-2004 Chevy/GMC 6.6L LB7 Duramax with the proper gaskets and seals. Shop today and get rear main seals, complete engine gasket sets, oil pan gaskets, intake manifold gaskets, and more. Use only the best quality gaskets to avoid issues when it comes to service work and repairs on your engine. Get the important gaskets your engine needs from major brands like MAHLE, Interstate-McBee, Cometic, Alliant, and factory replacement brands.