GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2000 🢒 Grand Prix 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Fuel Pressure Regulator Replacement

Removal Procedure

Important: Always maintain cleanliness when you service the fuel system components.


    Object Number: 155470 Size: SH
  1. Relieve the fuel pressure. Refer to Fuel Pressure Relief .
  2. Clean any dirt from the fuel pressure regulator retaining ring.
  3. Remove the vacuum line from the pressure regulator.

    4. Object Number: 12396 Size: SH
  4. Remove the snap ring (3).
  5. Use a shop towel in order to catch any spilled fuel. Lift and twist the fuel pressure regulator in order to remove the fuel pressure regulator (4) from the fuel pressure regulator housing (1).
  6. Remove the small regulator O-ring (7).
  7. Remove the large regulator O-ring (6).
  8. Remove the back-up regulator O-ring (5).
  9. Cover the fuel pressure regulator housing (1) in order to prevent contamination from entering the fuel system.

Installation Procedure

Notice: 

   • Do not use compressed air in order to test or clean a fuel pressure regulator as damage to the fuel pressure regulator may result.
   • Clean the fuel pressure regulator filter screen with gasoline if necessary.
   • Do not immerse the fuel pressure regulator in a solvent bath in order to prevent damage to the fuel pressure regulator.


    Object Number: 12396 Size: SH
  1. Install the new O-rings on the fuel pressure regulator (4), if a new fuel pressure regulator is not being installed. Lightly lubricate the O-rings with clean engine oil.
  2. Install the regulator back up O-ring (5).
  3. Install the regulator large O-ring (6).
  4. Install the regulator small O-ring (7).
  5. Install the fuel pressure regulator (4) in the fuel pressure regulator housing (1).
  6. Install the snap ring.

    7. Object Number: 155470 Size: SH
  7. Connect the vacuum line to the fuel pressure regulator.
  8. Tighten the fuel fill cap.
  9. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  10. Inspect for leaks.
    11. 10.1. Turn ON the ignition for 2 seconds.
    10.2. Turn OFF the ignition for 10 seconds.
    10.3. Turn ON the ignition.
    10.4. Inspect for fuel leaks.
  11. Install the fuel injection sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.