Delphi EX836104 Fuel Injection Pump

Delphi EX836104 Fuel Injection Pump Overview

The Delphi EX836104 is a remanufactured external fuel injection pump built for diesel fuel delivery applications that demand consistent pressure and reliable operation. It is a direct-fit option for select Chevrolet Express, Silverado, GMC Savana, and Sierra models, including 2010-2016 Chevrolet Express 2500 and 3500 and 2011-2016 Chevrolet Silverado 2500 HD and 3500 HD applications.

Built with Delphi OE heritage and remanufacturing expertise, this pump reflects the company’s long history supplying original equipment to major automakers. The EX836104 uses a metal housing, spade terminal type, push-on inlet, threaded outlet, and a 4-port layout for the specified fuel system configuration.

Key Features

• Remanufactured external fuel injection pump
• Metal housing for durable construction
• Spade terminal type
• Push-on inlet and threaded outlet
• 4-port design
• No electrical connector, wiring harness, filter, or mounting hardware included
• Package contents: fuel injection pump and instruction sheet
• Cross-reference: Bosch 0986437421

Detailed Product Description

Delphi EX836104 fuel injection pump is engineered for diesel fuel system service on select GM heavy-duty vans and pickups. It is an external, remanufactured unit with a metal housing and the specified inlet and outlet configuration to match the original fuel system layout. Delphi’s OE background is built into the remanufacturing process, helping maintain the fit and function expected for service replacement on Chevrolet Express 2500, Chevrolet Express 3500, GMC Savana 2500, GMC Savana 3500, Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD models.

This part number, EX836104, also cross-references 12661059 and 0445010616 for the same application. Verify the fuel system configuration before ordering to ensure the inlet, outlet, and terminal style match the vehicle’s original setup.

What This Pump Helps Address

• Hard starting caused by weak fuel delivery
• Loss of fuel pressure in the injection system
• Engine hesitation under load
• Fuel delivery inconsistency during acceleration
• Replacement needs for a worn or failing external injection pump

Installation Notes and Tips

Confirm the vehicle’s fuel system layout, port count, terminal style, and inlet/outlet orientation before installation. This pump does not include mounting hardware, a wiring harness, or a filter, so reuse or source the required related components as needed. Follow the included instruction sheet and inspect all fuel connections for proper sealing after installation. Fits 2010-2016 Chevrolet Express 2500, N/A; Fits 2010-2016 Chevrolet Express 3500, N/A; Fits 2011-2016 Chevrolet Silverado 2500 HD, N/A; Fits 2011-2016 Chevrolet Silverado 3500 HD, N/A; Fits 2010-2016 GMC Savana 2500, N/A; Fits 2010-2016 GMC Savana 3500, N/A; Fits 2011-2016 GMC Sierra 2500 HD, N/A; Fits 2011-2016 GMC Sierra 3500 HD, N/A.

Quality Assurance

Delphi draws on more than 100 years of OE experience and original-equipment supply knowledge in the design and remanufacturing of this fuel injection pump. That OE heritage supports a service part built for the specified GM diesel applications and fuel system requirements.