Walker 255-1186 Fuel Injection Pressure Regulator

Fuel Pressure Control for GM Applications

Walker Products 255-1186 is a fuel injection pressure regulator for select GM vehicles from 2000-2005. It helps maintain consistent fuel pressure at the rail, supporting stable engine operation in applications such as the Buick Century, Chevrolet Impala, and Pontiac Grand Am.

Walker Products has supplied fuel system components since 1946 and manufactures to meet or exceed OEM standards. The Walker Products line focuses on fuel injection repair and engine management parts backed by engineering and technical support.

Key Features

• Fuel injection pressure regulator for select GM fuel systems
• Includes O-rings for the listed application
• Walker Products part number 255-1186
• OE-style replacement for common GM passenger cars and minivans
• Cross-reference: Dorman OE Solutions 800-346

Detailed Description

This fuel injection pressure regulator is built for direct replacement use on a wide range of 2000-2005 GM vehicles, including the Chevrolet Malibu, Chevrolet Monte Carlo, Pontiac Grand Prix, Oldsmobile Alero, and Buick Rendezvous. It is also listed for the Chevrolet Cavalier, Pontiac Sunfire, and Chevrolet Lumina, making 255-1186 a useful match for owners searching by vehicle, model year, and fuel system component type.

Walker Products 255-1186 is intended for applications where fuel pressure control is critical to injector performance and drivability. If you are replacing a worn regulator on a Chevrolet Impala or Pontiac Montana, this part provides a direct-fit service option for the listed vehicles.

What It Helps Fix

• Hard starting caused by unstable fuel pressure
• Rich or lean running conditions from regulator wear
• Fuel pressure loss after shutdown
• Rough idle or hesitation under load
• Fuel delivery issues on listed GM fuel injection systems

Installation Notes and Tips

Verify the vehicle year, make, and model against the fitment list before ordering. Confirm the fuel system configuration and inspect the regulator mounting area and O-ring sealing surfaces during service. Clean the surrounding components before installation to help prevent contamination in the fuel system.

Quality Assurance

Walker Products is an ISO 9001/IATF 16949 certified manufacturer with in-house engineering and product management support. The company states that its fuel system components are produced to meet or exceed OEM standards and specifications.

Compatible Vehicles

• Fits 2000-2005 Buick Century, N/A
• Fits 2002-2005 Buick Rendezvous, N/A
• Fits 2000-2005 Chevrolet Impala, N/A
• Fits 2000-2005 Chevrolet Monte Carlo, N/A
• Fits 2001-2005 Pontiac Aztek, N/A
• Fits 2000-2005 Pontiac Grand Am, N/A
• Fits 2000-2005 Pontiac Montana, N/A
• Fits 2000-2004 Oldsmobile Alero, N/A
• Fits 2000-2004 Oldsmobile Silhouette, N/A
• Fits 2000-2003 Chevrolet Malibu, N/A
• Fits 2000-2003 Pontiac Grand Prix, N/A
• Fits 2001-2002 Chevrolet Cavalier, N/A
• Fits 2000-2002 Pontiac Sunfire, N/A
• Fits 2000-2001 Chevrolet Lumina, N/A