Sparta PN8004 Mechanical Fuel Pump

Mechanical Fuel Pump for GM Trucks

The Sparta PN8004 mechanical fuel pump is a standard replacement for gasoline-powered Chevrolet and GMC trucks and SUVs from the late 1970s through the late 1980s. Built with an aluminum housing and OE-focused fitment, it is suited for higher-mileage and earlier model vehicles that need consistent fuel delivery.

Key Features

• Mechanical fuel pump for gas applications
• Standard replacement grade for service repairs
• Average flow rating: 40.0
• Operating pressure range: 9 to 11.0
• Aluminum housing for durable construction
• Hose bead inlet with threaded outlet design
• 1 inlet and 2 outlets
• Gasket, mounting hardware, and instruction sheet included
• Part number: PN8004

Detailed Description

Sparta PN8004 is a mechanical fuel pump designed for gasoline engines that use a traditional cam-driven fuel delivery system. It features a 0.375-inch inlet outside diameter, a 5/8"-18 threaded outlet fitting, and a hose bead inlet for straightforward connection to the fuel system. The pump is built as a standard replacement and includes the gasket needed for installation. This part number, PN8004, is distributed through Delphi-backed OE fuel supply expertise and is aimed at earlier model, higher-mileage vehicles where correct fit and steady fuel delivery matter.

Compatible With Chevrolet K10, K10 Suburban, K20, K20 Suburban, K30, and K5 Blazer applications from 1978-1986, as well as GMC Jimmy and K1500, K1500 Suburban, K2500, K2500 Suburban, and K3500 applications from 1979-1986. It also fits Chevrolet C10 and C30, GMC C1500, C1500 Suburban, C2500, C2500 Suburban, and C3500 applications, plus 1987-1988 Chevrolet V30, 1988 Chevrolet R30, and 1987-1988 GMC V3500 applications. This part cross-references Airtex Fuel Pumps 41378 for the same application.

Common Issues This Pump Can Address

• Hard starting caused by weak fuel delivery
• Fuel starvation under normal driving conditions
• Low fuel pressure in carbureted gasoline systems
• Engine hesitation related to inconsistent pump output
• Replacement needs on aging mechanical fuel systems

Installation Notes and Tips

Verify inlet and outlet routing before installation, and confirm the threaded outlet size matches the existing fuel line connection. Replace the gasket during service and inspect the mounting surface for wear or damage. Because this is a mechanical fuel pump, it is intended for engines equipped with a compatible cam-driven pump setup.

Quality Assurance

Sparta is distributed by Delphi, an OE full-line fuel supplier, and is positioned for fitment and performance on earlier model vehicles. The PN8004 is built as a standard replacement fuel pump for service work on classic Chevrolet and GMC truck applications.