Make sure you maintain the fuel system in your 2004.5-2005 Chevy/GMC 6.6L LLY Duramax with the correct Fuel Filter. Change your fuel filter often to protect your fuel injectors, fuel injection pump, and engine from fuel system debris and contaminantion. Both aftermarket and stock replacement filters are designed using premium filter media to ensure proper filtration efficiency and holding capacity. Find the Fuel Filter and accessories your truck needs from top-name brands including AFE, Racor, Dorman, Motorcraft, ACDelco, and more!