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. Amazon: duramax filter head iFJF 12642623 Fuel Filter Head with Hand Fuel Pump and Heater and Aluminum Air Bleeder Screw for GM Chevrolet GMC Duramax V8 6 2004-2013 (Assembly) 3.7 out of 5 stars 13. 6.6 Duramax Fuel Filter Assembly - Fit for 2004-2013 Chevrolet Silverado GMC Sierra 2500 3500, Replace # 12642623 12639277 TP3018 12664429. Related searches for duramax fuel filter head heater duramax fuel filter heater2006 duramax fuel filter head2008 duramax fuel filter head2001 duramax fuel filter headduramax fuel filter head assembly2002 duramax fuel filter headduramax fuel heater locationduramax fuel tank heater