Bosch 66139 Fuel Pump Module Assembly

Overview

Bosch fuel pump module assembly 66139 is a specific-fit, electric in-tank fuel delivery unit for gasoline applications. It combines the pump, regulator, filter, sending unit, and sealing components needed for a complete fuel system service on select Chevrolet Express and GMC Savana vans.

Built to Bosch premium standards, part number 66139 is produced on the same manufacturing lines used for Bosch OE fuel pumps and tested to the same quality requirements. That makes it a practical choice when you need a Bosch fuel pump module assembly 66139 for a direct replacement service.

Key Features

• Specific-fit fuel pump module assembly for fuel injection systems
• Electric, internal tank design for gasoline applications
• Includes regulator, fuel filter, fuel sending unit, and sealing components
• OE-type inlet with quick-connect outlet for service-friendly plumbing
• Polymer/plastic housing with a female square/rectangle connector
• 12-volt operation with blade terminals and 2-wire electrical connection

Detailed Description

This Bosch fuel pump module assembly 66139 is engineered for select Chevrolet Express 3500 and 4500 models, as well as GMC Savana 3500 and 4500 models. It is a new, specific-fit module designed for internal tank installation and fuel injection service, with self-priming electric operation and a fuel-level sending unit included in the assembly.

The module uses an OE-type inlet, quick-connect outlet, synthetic or NBR rubber sealing material, and a push-on fuel pump strainer attachment. Bosch builds this fuel pump module assembly to premium aftermarket standards, drawing on OE production processes and testing practices to support consistent fuel delivery and service life. If you are replacing a worn fuel system component on a Chevrolet Express or GMC Savana, part number 66139 provides the correct module-style solution for the listed applications.

This part cross-references GM 19301238 for the same application.

What It Is Used For

• Restoring fuel pressure when the original pump can no longer maintain delivery
• Replacing a failing fuel level sender that causes inaccurate gauge readings
• Addressing hard-start or no-start conditions related to fuel supply
• Correcting fuel starvation, hesitation, or stalling caused by a weak module
• Servicing a leaking or degraded in-tank fuel pump module assembly

Installation Notes and Tips

Verify the vehicle application against the listed fitment before installation. This module is specific fit and is intended for internal tank use on the supported Chevrolet Express and GMC Savana applications. Confirm connector style, inlet and outlet configuration, and fuel system layout before removing the original unit.

Because the assembly includes sealing components, inspect the tank opening and surrounding surfaces for damage or contamination during service. Follow the vehicle service procedure for fuel system depressurization and electrical disconnection before replacement.

Quality Assurance

Bosch states that this fuel pump module assembly is manufactured and tested to the same standards used for Bosch OE fuel pumps. Part number 66139 is a new premium replacement built for reliable fuel delivery in the listed applications.