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Fuel Pressure Relief: Procedure

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Relieve the fuel system pressure before servicing fuel system components in order to reduce the risk of fire and personal injury.After relieving the system pressure, a small amount of fuel may be released when servicing the fuel lines or connections. In order to reduce the chance of personal injury, cover the regulator and the fuel line fittings with a shop towel before disconnecting. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete.
  1. Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
    2. Fig 1: Identifying Fuel Pressure Gauge J 34730-1A
    GM180378Courtesy of GENERAL MOTORS CORP.
  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. Install the drain hose from J 34730-1A  into an approved container.
  5. Open the valve on the J 34730-1A  in order to bleed the system pressure.
  6. Drain any fuel remaining in the gage into the approved container.
  7. Once the system pressure is completely relieved, remove J 34730-1A  .
  8. The fuel connections are now safe for servicing.
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