The primary purpose of the GMC Sierra Fuel Pump is to transport gasoline from the tank to the engine, ensuring the essential mixture is provided to every turn of the engine crank for combustion to occur. Sierra trucks were equipped with a camshaft-driven mechanical Fuel Pump that mounted on the engine block. The Fuel Pump had a lever and diaphragm that gently pulled fuel forward at six to fifteen psi. This was a better psi for carburetors. With the switch to injection from carburetion, GMC switched to an in-tank electric Fuel Pump that spins as soon as the ignition key is turned. It pushes fuel at forty to sixty psi through the lines. The Fuel Pump stays cool and quiet under the liquid it moves. This submerged design combines with the level-sending float to provide a dashboard reading for the driver and reduce fire risk. In the case of a modern Sierra that cranks but does not start, owners should listen for the prime and then verify voltage at the connector. Next, check the relay before looking into pressure or volume shortfalls. Performance-minded GMC owners can size the Fuel Pump by taking the estimated horsepower and multiplying it by either 0.5 for naturally aspirated or 0.75 for boosted setups and converting that pounds-per-hour figure into gallons to select a unit that meets demand without excessive pressure.
Each OEM GMC Sierra Fuel Pump we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.