GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 34730-1A Fuel Pressure Gauge


    Object Number: 180378  Size: SH
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Install the J 34730-1A . Refer to Fuel Pressure Gage Installation and Removal .
  3. Loosen the fuel fill cap in order to relieve the fuel tank vapor pressure.
  4. Open the valve on J 34730-1A in order to bleed the system pressure. The fuel connections are now safe for servicing.
  5. Drain any fuel remaining in the gauge into an approved container.
  6. Once the system pressure is completely relieved, remove the J 34730-1A .