GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 34730-1A Fuel Pressure Gage

  1. Turn the ignition OFF.
  2. Disconnect the negative battery cable in order to avoid possible fuel discharge if an accidental attempt is made to start the engine. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  3. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 2.8L.
  4. Remove the air inlet grille panel. Refer to Air Inlet Grille Panel Replacement in Body Front End.

  5. Object Number: 180378  Size: SH
  6. Connect the J 34730-1A to the fuel pressure valve. Wrap a shop towel around the fitting while connecting the gage in order to avoid spillage.
  7. Install the bleed hose into an approved container.
  8. Open the valve in order to bleed the system pressure. Fuel connections are now safe for servicing.
  9. Drain any fuel remaining in the gage into an approved container.
  10. Install the air inlet grille panel. Refer to Air Inlet Grille Panel Replacement in Body Front End.
  11. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 2.8L.
  12. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.