Tools Required

J 34730-1A  Fuel Pressure Gage

Fig 1: Identifying Fuel Pressure Gauge J 34730-1A
Courtesy of GENERAL MOTORS CORP.
1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
2. Install 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 gage into an approved container.
6. Once the system pressure is completely relieved, remove J 34730-1A  .