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Home >> Cadillac >> 2011 >> STS AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 3.6L - Repair Instructions >> Repair Instructions >> Primary Fuel Tank Module Replacement >> Removal Procedure
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Removal Procedure

    Fig 1: Fuel Tank Module And Fuel Feed Hose
    GM1994039Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    Refer to Gasoline/Gasoline Vapors Warning .

  1. Remove the fuel tank in order to gain access to the primary fuel tank module (1). Refer to Fuel Tank Replacement .
    2. Fig 2: Identifying Wire Harness, Fuel Feed Hose And Electrical Connector
    GM1994056Courtesy of GENERAL MOTORS COMPANY
  2. Disconnect the fuel feed hose quick connect fitting (4) from the primary fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service .
  3. Remove the fuel feed hose (2) from the retainer on the fuel tank and position the hose aside.
  4. Release the interlock and disconnect the electrical connector (3) from the primary fuel tank module.
  5. Remove the wire harness (1) from the retainer on the fuel tank and position the harness aside.
    6. Fig 3: Breaker-Bar And Fuel Tank Module Lock Ring
    GM1994064Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Avoid damaging the lock ring. Use only J-45722 to prevent damage to the lock ring.

    CAUTION:

    Do Not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints.

    NOTE:
    • DO NOT use impact tools. Significant force will be required to release the lock ring. The use of a hammer and screwdriver is not recommended. Secure the fuel tank in order to prevent fuel tank rotation.
    • Do not allow the tool to come in contact with the fuel pipe while unlocking the cam lock ring.
  6. Use the J 45722 (2) and a long breaker-bar (1) in order to unlock the fuel tank module lock ring (3), by turning counterclockwise.
  7. Remove the cam lock ring.
    8. Fig 4: Identifying Primary Fuel Tank Module, Float Arm, Quick Connect Fitting & Module Seal
    GM1994068Courtesy of GENERAL MOTORS COMPANY
  8. Partially remove the primary fuel tank module (1) in order to gain access to the fuel transfer hose quick connect fitting (3). Use care not to damage the float arm (2).
  9. Disconnect the fuel transfer hose quick connect fitting (3).
  10. Remove the primary fuel tank module from the fuel tank.
  11. Discard the fuel tank module seal (4).
    12. Fig 5: Checking Lock Ring For Flatness
    GM1617750Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Some lock rings were manufactured with "DO NOT REUSE" stamped into them. These lock rings may be reused if the lock rings are not damaged or warped.
    • Inspect the lock ring for damage due to improper removal or installation procedures. If damage is found, install a NEW lock ring.
    • Check the lock ring for flatness.
  12. Place the lock ring on a flat surface. Measure the clearance between the lock ring and the flat surface using a feeler gauge at 7 points.
  13. If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
  14. If warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.
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