Autobest F2591A Fuel Pump Module Assembly

Fuel Pump Module Assembly for GM Vans

The Autobest F2591A fuel pump module assembly is built for direct replacement service in select Chevrolet Express 3500 and GMC Savana 3500 applications. It combines the pump, fuel sending unit, filter, regulator, gasket/seal, and strainer in one in-tank assembly for a complete fuel system repair.

Designed for 12V operation with a turbine pump, this module supports steady fuel delivery and ethanol-tolerant performance for modern fuel systems. It is a practical choice when servicing a 2004-2005 Chevrolet Express 3500 or 2004-2005 GMC Savana 3500 with RPO code NF4.

Key Features

• Autobest Fuel Pump Module Assembly, part number F2591A
• In-tank turbine pump with 12V electrical design
• Average flow rating of 37.9 GPH and average current draw of 7.5A
• Maximum pump pressure of 62 PSI and minimum pump pressure of 55 PSI
• Includes fuel filter, fuel sending unit, gasket/seal, strainer, and regulator
• Male connector with racetrack shape, 4-pin terminal layout
• 3/8 in. quick-connect outlet and 0.314 in. inlet size
• Performance-grade construction with POM housing and NBR seal material
• Negative ground design with internal strainer

Detailed Description

The Autobest Fuel Pump Module Assembly F2591A is a complete in-tank fuel delivery unit for GM full-size vans that use the NF4 fuel pump module configuration. It is engineered with top-grade components and tested throughout manufacturing to support consistent fuel delivery, accurate fuel level reporting, and dependable operation in ethanol-blended fuel environments. This module is a direct-fit service part for 2004-2005 Chevrolet Express 3500 and 2004-2005 GMC Savana 3500 models.

This part cross-references Delphi FG0403 for the same application. The Autobest F2591A also aligns with OE-style replacement numbers including 19133510 and 19133511 for related service needs.

What It Helps Fix

• Hard starting caused by weak or inconsistent fuel pressure
• Engine stalling from fuel delivery interruption
• Incorrect fuel gauge readings from a worn sending unit
• Fuel pressure loss related to an aging in-tank module
• Driveability issues tied to a failing pump, regulator, or strainer

Installation Notes and Tips

Verify the vehicle’s RPO code NF4 before ordering. This module is designed for in-tank installation and uses a 3/8 in. quick-connect outlet with a male racetrack connector and 4-pin terminal layout. Confirm connector style, tank configuration, and fuel line routing against the original unit before installation.

For best results, inspect the fuel tank, electrical connector, and fuel lines for contamination or wear during replacement. Matching the original application details helps ensure proper fitment on Chevrolet Express 3500 and GMC Savana 3500 models.

Quality Assurance

Autobest uses top-quality materials and tests fuel pump components throughout the manufacturing process to help maintain product consistency. The F2591A is backed by a limited lifetime warranty and is supplied for service use in demanding fuel system applications.