LEMON Manuals: Even more car manuals for everyone: 1960-2025
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 >> Installation Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Installation Procedure

    Fig 1: Identifying Primary Fuel Tank Module, Float Arm, Quick Connect Fitting & Module Seal
    GM1994068Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Always replace the fuel tank module seal when installing the fuel tank module assembly. Replace the lock ring if necessary. DO NOT apply any type of lubrication in the seal groove.

  1. Install a NEW fuel tank module seal (4).
  2. Grasp the fuel transfer hose from inside the fuel tank.
  3. Partially install the primary fuel tank module (1) to the fuel tank.
  4. Connect the fuel transfer hose quick connect fitting (3) to the port on the fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service .
  5. Fig 2: Breaker-Bar And Fuel Tank Module Lock Ring
    GM1994064Courtesy of GENERAL MOTORS COMPANY
  6. Press the primary fuel tank module downward, aligning the module to the encapsulated ring.
  7. NOTE:

    Ensure the lock ring is installed with the correct side facing upward. A correctly installed lock ring will only turn in a clockwise direction.

  8. Position the cam lock ring (3) to the fuel tank.
  9. NOTE:

    DO NOT use impact tools. Significant force will be required to install the lock ring. The use of a hammer and screwdriver is not recommended. Secure the fuel tank in order to prevent fuel tank rotation.

  10. Use the J 45722 (2) and a long breaker-bar (1) to install the fuel tank module lock ring (3), by turning clockwise, until fully seated.
  11. Fig 3: Identifying Wire Harness, Fuel Feed Hose And Electrical Connector
    GM1994056Courtesy of GENERAL MOTORS COMPANY
  12. Connect the electrical connector (3) to the primary fuel tank module and engage the connector interlock.
  13. Install the wire harness (1) to the retainer on the fuel tank.
  14. Connect the fuel feed hose quick connect fitting (4) to the primary fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service .
  15. Install the fuel feed hose (2) to the retainer on the fuel tank.
  16. Install the fuel tank. Refer to Fuel Tank Replacement .