GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Express 🢒 Engine 🢒 Engine Controls - 8.1L 🢒 Fuel Pressure Regulator Replacement

Removal Procedure
  1. Remove the engine cover. Refer to Engine Cover Replacement in Interior Trim.
  2. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .

    3. Object Number: 665447 Size: SH
  3. Disconnect the fuel pressure regulator vacuum line (1).
  4. Clean any dirt from the fuel pressure regulator retainer and the surrounding area.

    5. Object Number: 705539 Size: SH
  5. Remove the fuel pressure regulator retainer (9).
  6. Remove the fuel pressure regulator (8) from the fuel pressure regulator housing.

Installation Procedure

    Object Number: 705539 Size: SH
  1. Install the backup ring (10) on the fuel pressure regulator (8).
  2. Install the new large O-ring (11) on the fuel pressure regulator.
  3. Install the regulator filter (12) on the fuel pressure regulator.
  4. Install the new small O-ring (13) on the fuel pressure regulator.
  5. Lubricate the fuel pressure regulator large O-ring and the small O-ring with clean engine oil.
  6. Push the fuel pressure regulator into the regulator housing on the fuel rail.
  7. Install a new fuel pressure regulator retainer (9).

    8. Object Number: 665447 Size: SH
  8. Connect the fuel pressure regulator vacuum line.
  9. Connect the negative battery cable.
  10. Tighten the fuel filler cap.
  11. Inspect for leaks:
    12. 11.1. Turn ON the ignition for 2 seconds.
    11.2. Turn OFF the ignition for 10 seconds.
    11.3. Turn ON the ignition .
    11.4. Inspect for fuel leaks.
    11.5. Install the engine cover. Refer to Engine Cover Replacement in Interior Trim.