Removal (4.3L)
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE .
- Fuel pressure regulator is mounted to fuel meter assembly, under upper intake manifold. Remove upper intake manifold. See INTAKE MANIFOLD .
- Before removal, clean fuel meter body assembly with a spray type engine cleaner, such as GM X-30A. DO NOT use any solvent that contains Methyl Ethyl Ketone (MEK). Solvents containing MEK may damage fuel system components.
- Remove fuel pressure regulator retaining clip. Place shop towel below fuel pressure regulator to catch any spilled fuel.
- Pull and twist fuel pressure regulator to remove from fuel pressure regulator housing. Remove lower "O" ring, filter, upper "O" ring and back-up ring. Cover the fuel pressure regulator housing to prevent contamination from entering the fuel system. Discard the "O" rings.