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Home >> Cadillac >> 2005 >> CTS V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 5.7L - Introduction >> Repair Instructions >> Fuel Pressure Relief Procedure >> Relief Procedure
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Relief Procedure

    Fig 1: View Of Fuel Injector Sight Shield
    GM1392497Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to BATTERY DISCONNECT CAUTION in Cautions and Notices.
  1. Turn the ignition OFF.
  2. Disconnect the negative battery cable in order to avoid possible fuel discharge if an accidental attempt is made to start the engine. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  3. Loosen the fuel filler cap in order to relieve the fuel tank vapor pressure.
  4. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.
    5. Fig 2: Identifying Fuel Pressure Gauge J 34730-1A
    GM180378Courtesy of GENERAL MOTORS CORP.
  5. Connect the J 34730-1A  to the fuel pressure connection at the left front of the fuel rail. Wrap a shop towel around the fitting while connecting the gage in order to avoid spillage.
  6. Install the bleed hose of the gage into an approved container.
  7. Open the valve on the gage to bleed the system pressure. The fuel connections are now safe for servicing.
  8. Drain any fuel remaining in the gage into an approved container.
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