GM Service Manual Online
For 1990-2009 cars only

Relief Procedure

Tools Required

J 34730-1A Fuel Pressure Gauge

  1. Remove the rear seat cushion. Refer to Rear Seat Cushion Replacement

  2. Object Number: 13586  Size: SH
  3. Disconnect the negative battery terminal to avoid possible fuel discharge if an accidental attempt is made to start the engine. Refer to

    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.

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  4. Loosen the fuel filler cap to relieve tank vapor pressure.

  5. Object Number: 49593  Size: SH
  6. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  7. Connect Fuel Pressure Gauge J 34730-1A to the fuel pressure connection. Wrap a shop towel around the fuel pressure connection while connecting the fuel pressure gauge in order to avoid spillage.
  8. 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.
  9. Drain any fuel remaining in the fuel pressure gauge into an approved container.