GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 34730-1A , Fuel Pressure Gauge


    Object Number: 289014  Size: SH
  1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  2. Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  3. Disconnect the negative battery terminal to avoid possible fuel discharge if an accidental attempt is made to start the engine.

  4. Object Number: 155471  Size: SH
  5. Loosen the fuel filler cap to relieve tank vapor pressure.

  6. Object Number: 220465  Size: SH
  7. Remove the fuel pressure connection cap. (1)
  8. Connect the fuel pressure gauge J 34730-1A to the fuel pressure connection.
  9. Wrap a shop towel around the fuel pressure connection while connecting the fuel pressure gauge in order to avoid spillage.
  10. Install the bleed hose into an approved container and open the valve to bleed the fuel system pressure. The fuel connections are now safe for servicing.
  11. Drain any fuel remaining in the fuel pressure gauge into an approved container.
  12. Tighten the fuel pressure connection cap after completing service.
  13. Tighten the fuel filler cap
  14. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  15. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  16. Tighten
    Tighten the nuts to 3 N·m (27 lb in).