Whether your Duramax broke a crank or cracked a piston, this is the factory replacement you need. Built the way it should have been from the factory, the Duramax Long Block is balanced and ready to get back to work. At Miller Built Diesel, we understand the demands of your diesel engine and offer top-notch repair services to ensure optimal performance. Trust our expertise to get you back on the road with the durability and reliability you expect.