Add Power Steering Fluid to the reservoir and stop the whining in your 2011-2016 Chevy/GMC 6.6L LML Duramax. Quality lubricants offer extended fluid service life with increased lubricity for greater wear protection. Able to withstand to high temperatures while providing excellent corrosion and oxidation protection. To match your needs, XDP offers high-quality lubricants under the Lucas Oil and Royal Purple brands.