Removal (4.2L)
WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- Release fuel pressure. See FUEL SYSTEM PRESSURE RELEASE . Remove air cleaner resonator from top of engine. Fuel pressure regulator is mounted on fuel rail near front of engine. See Fig 1. Disconnect engine wiring harness from retaining clips at front of engine.
- Clean area surrounding fuel pressure regulator 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. Disconnect fuel pressure regulator vacuum line.
- Place shop towel below fuel pressure regulator to catch any spilled fuel. Disconnect fuel return line at fuel pressure regulator. See FUEL LINE DISCONNECT FITTINGS (4.2L) .
- Remove screws from fuel pressure regulator retainer and fuel return line retainer. Remove fuel pressure regulator retainer and fuel return line retainer. Remove fuel pressure regulator.