Dorman 904-577 Fuel Injection Pressure Regulator

Dorman 904-577 Fuel Pressure Regulator

Dorman 904-577 is a standard replacement fuel injection pressure regulator built to match the fit and function of the original equipment part on specified vehicles. It uses metal construction for durability and consistent service life in common rail fuel systems.

Compatible with 2010-2016 Chevrolet Express 2500, 2010-2016 Chevrolet Express 3500, 2011-2016 Chevrolet Silverado 2500 HD, 2011-2016 Chevrolet Silverado 3500 HD, 2010-2016 GMC Savana 2500, 2010-2016 GMC Savana 3500, 2011-2016 GMC Sierra 2500 HD, and 2011-2016 GMC Sierra 3500 HD. This part cross-references Standard Ignition PR542 for the same application.

Key Features

• OE-style fuel injection pressure regulator for specified Chevrolet and GMC applications
• Metal body construction for durability and long service life
• Common rail fuel system style
• Stock pressure range with a maximum pressure reading of 50
• Female-thread inlet attachment with bolt-on outlet attachment
• Direct replacement design for factory-style fit and function
• Dorman 904-577 replacement part number for easy identification

Detailed Description

This fuel pressure regulator is engineered as a direct replacement for the original regulator used on select Chevrolet Express, Silverado HD, GMC Savana, and Sierra HD models. It is built for common rail fuel injection systems and uses a metal housing to support dependable operation in demanding engine bay conditions. The inlet and outlet dimensions are matched for the specified application, helping maintain proper fuel pressure control within the stock range. Dorman 904-577 is a practical choice when replacing a worn or failing regulator on 2010-2016 Chevrolet Express 2500 and 3500, as well as 2011-2016 Chevrolet Silverado 2500 HD and 3500 HD, and the corresponding GMC Savana and Sierra HD models.

What It Helps Fix

• Hard starting caused by unstable fuel pressure
• Rough idle related to inconsistent rail pressure
• Fuel delivery issues from a worn regulator diaphragm or valve
• Loss of engine performance tied to incorrect fuel pressure control
• Fuel system fault codes associated with pressure regulation problems

Installation Notes and Tips

Verify vehicle fitment by year, make, and model before installation. This regulator uses a female-thread inlet and bolt-on outlet attachment, so confirm the fuel system connection style matches the original part. Inspect the surrounding fuel lines, seals, and connectors during replacement to help prevent leaks and repeat repairs. Follow factory service procedures for depressurizing the fuel system before removal and installation.

Quality Assurance

Dorman builds this regulator as a standard replacement part using quality materials for durability and service life. It is designed to match original equipment fit and function on the listed Chevrolet and GMC applications.