Brand New Heavy Duty Supply/Lift pump for all 6.5 Diesel H1 HUMMERS. This pump is a perfect fit and will restore the necessary  fuel pressure to the Injection Pump. This is the correct pump for your diesel, NOT an "also fit". Includes the correct harness connector to just "plug-in".

The supply pump or lift pump as it's called is a booster pump that takes fuel from the tank and sends it to the injection pump. The injection pump needs to be fed 3-5 psi of pressure to work properly. If not, you will experience hard starting,  and a hesitation or "hiccup" as you accelerate quickly. Also check the oil pressure switch as that switch is what turns this pump on and off. Switch also sold on this website separately.

On H1 HUMMERs it is located on the firewall next to the fuel filter. Easily changed in minutes.