DIY Duramax Fuel Fix: Rebuilding A Leaky Fuel Filter Head 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. DMAX Fuel Filter Head Assembly (LLY-LMM) | DMAX Store This is an updated direct fit filter head for your 2004.5 - 2010 Duramax. Dmaxstore reccomends our part #DMAX359 which eliminates the heater wires and Oring that commonly leak. Priming issues are a common symptom of a bad fuel filter head. Includes: New Nylon Bleeder Screw; Brand New Filter Head Duramax diesel fuel filter head rebuild how to by Merchant Click to view on Bing6:37A comprehensive step by step on how to rebuild your fuel filter head on your Duramax Diesel. Filter head rebuild kit - http://wwwhant-automotive/p-7..Author: Merchant AutomotiveViews: 217K GM 12642623 Fuel Filter Head Assembly The GM 12642623 Fuel Filter Head Assembly for your 2004.5-2010 GM 6 Duramax is an OE factory replacement for your GM Duramax. Over time, the stock fuel filter head can leak or become damaged causing poor running conditions, hard starting and more. DMAX Fuel Filter Head Assembly (LB7) | DMAX Store DmaxStore Fuel Filter Head Assembly. Fits 2001-2004 Chevy / GMC 2500HD / 3500HD . Part# DMAX061. Direct replacement for GM Part# 97780061 . Replace your worn or leaking filter head with a brand new unit. This is a direct replacement for your 2001-2004 LB7 Duramax and no fuel line modification is needed.