DMAX Fuel Filter Head Assembly (LLY-LMM) | DMAX Store DmaxStore Fuel Filter Head Assembly. Direct fit for 2004.5-2010 LLY/LBZ/LMM Duramax. Part# DMAX619 . This Part is a direct fit for 2004.5-2010 Chevy/GMC 2500HD Duramax 6.6. It can be made to work with 2001-2004 model years. This is an updated direct fit filter head for your 2004.5 - 2010 Duramax. DIY Duramax Fuel Fix for Leaky Filters - Diesel World A common problem with high-mileage 2001-2010 Duramax trucks is that the fuel filter head assembly begins to develop air leaks. The engine’s CP3 high-pressure fuel pump is capable of drawing fuel from the tank without the aid of an external lift pump as long as the system remains primed.
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