Dorman 904-577 Fuel Injection Pressure Regulator

Reliable Fuel Injection Pressure Regulator for Chevrolet and GMC

The Dorman 904-577 fuel injection pressure regulator is designed to maintain consistent fuel pressure in common rail fuel systems. Engineered with durable metal construction, this regulator is compatible with select Chevrolet and GMC heavy-duty trucks and vans, ensuring stable fuel delivery under various operating conditions.

Key Features of the Dorman 904-577 Fuel Pressure Regulator

• Constructed from metal for durability and long service life
• Maximum pressure reading of 50 psi for accurate fuel regulation
• Inlet port diameter of 0.12 inches with female threaded attachment
• Four outlet ports with 0.093 inch diameter, bolt-on attachment type
• Non-flanged inlet and outlet types for secure connections
• Compatible with common rail fuel injection systems
• Standard replacement grade for reliable performance
• Includes one fuel pressure regulator per package

Detailed Description of the Fuel Injection Pressure Regulator

The Dorman 904-577 fuel injection pressure regulator is engineered to provide precise fuel pressure control in common rail systems found in Chevrolet Express 2500, Express 3500, GMC Savana 2500, Savana 3500, Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, and Silverado 3500 HD models. Its metal construction ensures resistance to wear and corrosion, while the non-flanged inlet and outlet ports with female threaded and bolt-on attachments provide secure and leak-free connections. The regulator maintains a maximum pressure reading of 50 psi, supporting optimal engine performance and fuel efficiency. This part is a standard replacement unit designed to meet OEM specifications without adjustable fuel pressure or boost/vacuum reference ports, simplifying installation and operation.

Common Applications and Issues Addressed

• Maintains consistent fuel pressure in common rail fuel injection systems
• Prevents fuel pressure fluctuations that can cause engine hesitation or stalling
• Resolves issues related to poor fuel economy due to incorrect fuel pressure
• Eliminates rough idling caused by unstable fuel delivery
• Helps avoid engine misfires linked to fuel pressure irregularities

Installation Notes and Tips

When installing the Dorman 904-577 fuel injection pressure regulator, ensure the inlet and outlet ports align correctly with the vehicle’s fuel system connections. The inlet features female threaded attachment, while the outlet uses a bolt-on type, so appropriate tools are required for secure mounting. Since this is a standard replacement part without adjustable pressure or boost/vacuum reference ports, no additional calibration is necessary. Verify fuel system compatibility with the specified Chevrolet and GMC models before installation.

Quality Assurance and Warranty

Dorman manufactures the 904-577 fuel injection pressure regulator to meet industry standards for durability and performance. This part is designed as a standard replacement component, ensuring reliable operation within the specified pressure range. While specific warranty details are not provided, Dorman products typically adhere to quality control processes to support vehicle maintenance and repair needs.