An ACDelco GM Original Equipment Mechanical Fuel Pump is a GM-recommended replacement for your vehicle's original components, and is a diaphragm positive displacement pump. A rocker arm driven off the fuel pump camshaft lobe moves the diaphragm, causing fuel to be drawn in through a one-way inlet reed valve. As the cam lobe rotates away from the rocker arm, a spring pushes the diaphragm back, pushing the fuel out through a one-way outlet reed valve to the carburetor. This original equipment fuel pump has been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Product Features:

• Able to fulfill original equipment specifications on earlier-model carbureted engines
• Meet the original model year specific requirements for both Environmental Protection Agency (EPA) and California Air Resources Board of Emissions (CARB) certifications
• GM-recommended replacement part for your GM vehicle's original factory component
• Offering the quality, reliability, and durability of GM OE
• Manufactured to GM OE specification for fit, form, and function