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Fuel Pressure Relief

WARNING: To reduce the risk of fire and personal injury, it is necessary to relieve the fuel system pressure before servicing fuel system components.
  1. Remove fuel pump fuse B1 in the Console Fuse Block to avoid possible fuel discharge if an accidental attempt is made to start the engine. See Fig 1 and Fig 2 .
    Fig 1: Locating Console Fuse Block
    G00090291Courtesy of GENERAL MOTORS CORP.
    Fig 2: Identifying Console Fuse Block Fuses
    G00097791Courtesy of GENERAL MOTORS CORP.
  2. Loosen fuel filler cap to relieve tank vapor pressure.
  3. Connect Fuel Pressure Gauge J 34730-1, or equivalent, to fuel pressure connection. Wrap a shop towel around fitting while connecting gage to avoid spillage.
  4. Install bleed hose into an approved container and open valve to bleed system pressure. Fuel connections are now safe for servicing.
  5. Drain any fuel remaining in gage into an approved container.