2005 Buick Century CustomFACTORY OEM SERVICE PROCEDURE

Fuel Pressure Relief Procedure

Tools Required

    Fig 1: Identifying Fuel Pressure Gauge J 34730-1A
    GM180378Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
    2. IMPORTANT: Mount the fuel pressure gage fitting below the belt to avoid contact with the belt.
  2. Install the J 34730-262  to the fuel pressure connection.
  3. Connect J 34730-1A  to the fuel pressure gage fitting. Wrap a shop towel around the fuel pressure connection while connecting the fuel pressure gage in order to avoid spillage.
  4. 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.
  5. Drain any fuel remaining in the fuel pressure gauge into an approved container.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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