All generations of the Duramax diesel engine except for the L5P have a fuel system that does not use a lift pump. So many always ask what does a lift pump actually do and do I really need a lift pump on my Duramax?

We are going to answer those questions today. To start let us look at the benefits from installing a lift pump for Duramax diesel engines. Diesel engines work on high compression and fuel, so clean diesel fuel without any air bubbles is vital to keep the engine running smoothly. The factory Duramax fuel system is made up of 2 key components. The Duramax fuel injectors obviously deliver fuel to each cylinder, and the Injection pump. The Injection pump whether it be a CP3 or a CP4 is a high pressure pump that pulls diesel fuel from the tank using a vacuum action and then delivers the fuel to the injectors.

Air bubbles in fuel are terribly harmful to Duramax injectors and injection pumps, it’s always been common sense that dirty fuel is harmful but most do not understand how detrimental air is. Air bubbles in diesel will tear up your trucks fuel system and can be the most costly parts to get repaired.

Fass Duramax Lift Pumps deliver fuel to the injection pump to eliminate the need for any air bubble creating vacuum action. The delivery of the fuel without air alone should be enough to answer the question, Do I really need a lift pump on a Duramax. But the Fass lift pump goes even further cleaning and actually polishing fuel ridding of all dirt, debris and grime down to 2 microns. 2 microns of filtration is better than most all of factory fuel filters. Install a Duramax Fass lift pump is a key step in keeping your Duramax diesel pickup on the road for years to come.