GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 34730-1A Fuel Pressure Gauge
    • J 34730-262 Fuel Pressure Gauge Fitting

Relief Procedure


    Object Number: 180378  Size: SH
  1. Disconnect the negative battery terminal Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Loosen the fuel filler cap to relieve tank vapor pressure.
  3. Important: Mount the fuel pressure gauge fitting below the belt to avoid contact with the belt.

  4. Install the J 34730-262 adaptor to the fuel pressure connection.
  5. Connect the J 34730-1A to the fuel pressure gauge fitting. Wrap a shop towel around the fuel pressure connection while connecting the fuel pressure gauge in order to avoid spillage.
  6. Install the bleed hose into an approved container and open the valve to bleed the system pressure. The fuel connections are now safe for servicing.
  7. Drain any fuel remaining in the fuel pressure gauge into an approved container.