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Home >> Cadillac >> 2018 >> Escalade Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 8 (Engine Controls And Fuel - 6.0L (L96) - Repair Instructions) >> Repair Instructions >> Fuel Tank Replacement (Front Tank) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

Clean all fuel and evaporative emission (EVAP) line connections and surrounding areas prior to disconnecting the lines in order to avoid possible fuel and/or EVAP system contamination.

    Fig 1: Fuel Hoses And Clamp
    GM1704321Courtesy of GENERAL MOTORS COMPANY
  1. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief (CH-48027) Fuel Pressure Relief (Without CH-48027) .
  2. Drain the fuel tank. Refer to Fuel Tank Draining (Front Tank) .
  3. Disconnect the fill pipe evaporative emission (EVAP) line quick connect fitting (2) from the fuel tank vent valve. Refer to Plastic Collar Quick Connect Fitting Service .
    4. Fig 2: Vapor Line At Fuel Tank
    GM1372488Courtesy of GENERAL MOTORS COMPANY
  4. Disconnect the EVAP line quick connect fitting (1) from the fuel tank vent valve. Refer to Plastic Collar Quick Connect Fitting Service .
    5. Fig 3: Fuel Feed And EVAP Lines At Fuel Tank
    GM1372476Courtesy of GENERAL MOTORS COMPANY
  5. Disconnect the chassis fuel feed and EVAP line quick connect fittings from the fuel tank line quick connect fittings. Refer to Plastic Collar Quick Connect Fitting Service .
    6. Fig 4: Fuel And EVAP Intermediate Lines At Fuel Tank
    GM1224396Courtesy of GENERAL MOTORS COMPANY
  6. Open the clip on the side of the fuel tank retaining the intermediate lines.
  7. Disconnect the fuel and EVAP intermediate line quick connect fittings from the front tank lines. Refer to Plastic Collar Quick Connect Fitting Service .
  8. Cap the fuel and EVAP lines in order to prevent possible fuel/EVAP system contamination.
    9. Fig 5: Fuel Tank And Straps (Front Tank)
    GM1224378Courtesy of GENERAL MOTORS COMPANY
  9. Using an adjustable jack, support the fuel tank.
    10. CAUTION:

    Refer to Damage to Fuel Tank Straps Caution .

  10. Remove the fuel tank strap bolts.
  11. Remove the fuel tank straps.
    12. NOTE:

    When lowering the fuel tank, ensure that the EVAP line does not get caught on anything.

  12. With the aid of an assistant, carefully lower the fuel tank until the electrical connectors can be accessed.
    13. Fig 6: Fuel Tank Module Electrical Connector
    GM1705648Courtesy of GENERAL MOTORS COMPANY
  13. Disengage the connector position assurance (CPA) retainer.
  14. Disconnect the chassis harness electrical connector (1) from the fuel tank module.
  15. Completely lower the fuel tank.
  16. Place the fuel tank in a suitable work area.
  17. If replacing the fuel tank proceed to the next step, otherwise proceed to step 14 in the installation procedure.
    18. Fig 7: Fuel Tank Shield And Retainers
    GM1705654Courtesy of GENERAL MOTORS COMPANY
  18. Remove the fuel tank shield retainers (1) and shield (2).
    19. Fig 8: Fuel Tank Clips
    GM1705656Courtesy of GENERAL MOTORS COMPANY
  19. Remove the EVAP line from the fuel tank clip (1).
  20. Open the fuel tank clips (2 - 7) and remove the fuel/EVAP lines from the clips.
  21. Disconnect the fuel/EVAP line quick connect fittings from the fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service .
    22. Fig 9: Fuel Tank EVAP Lines
    GM1705659Courtesy of GENERAL MOTORS COMPANY
  22. Remove the fuel/EVAP lines from the fuel tank.
    23. Fig 10: Special Tool And Lock Ring
    GM1705661Courtesy of GENERAL MOTORS COMPANY
  23. Using the J-45722  wrench remove the lock ring.
    24. Fig 11: Fuel Tank Module Quick Connect Fitting
    GM1705662Courtesy of GENERAL MOTORS COMPANY
  24. Carefully lift the module from the fuel tank, enough to access the quick connect fitting (1) under the module cover. Disconnect the quick connect fitting. Refer to Plastic Collar Quick Connect Fitting Service .
  25. Remove the fuel tank module.
  26. Remove and discard the fuel tank module seal.
    27. Fig 12: 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 they 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.
  27. 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.
  28. If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
  29. If warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.
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