The Airdog R4SBC137 Raptor 4G 150GPH Fuel Pump is the perfect choice for your LML Duramax. With its gerotor pump design, it doesn't need a return line, and it comes with a lifetime limited express warranty. The built-in adjustable regulator is preset at 8-10 PSI, making it easy to install. This pump also includes plumbing, hardware, and required components for installation.