Give your 2017-2019 Chevy/GMC 6.6L L5P Duramax the Transmission Fluid it needs to service your vehicle. Using a quality fluid provides you with smooth gear changes and contains additives to prevent the formation of corrosion, rust, and foam. Available in conventional and synthetic varieties, these transmission fluids offer longer service life by reducing damaging heat and wear. Royal Purple, Hot Shot's Secret, Lucas Oil, and Sun Coast Converters are just some of the manufactures XDP offers.