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Home >> Chevrolet >> 2017 >> SS Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 6.2L (LS3) - Repair Instructions >> Repair Instructions >> Secondary Fuel Tank Module Replacement >> Removal Procedure
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Removal Procedure

  1. Ignition OFF.
    2. WARNING:

    Refer to Battery Disconnect Warning .

  2. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
    3. WARNING:

    Refer to Safety Glasses Warning .

    WARNING:

    Refer to Gasoline/Gasoline Vapors Warning .

    WARNING:

    Refer to Relieving Fuel Pressure Warning .

  3. Relieve the low side fuel pressure. Refer to Fuel Pressure Relief .
    4. WARNING:

    To avoid any vehicle damage, serious personal injury or death:

    • When major components are removed from the vehicle and the vehicle is supported by a hoist, support the vehicle with jack stands at the opposite end from which the components are being removed and strap the vehicle to the hoist.
    • When performing work in the engine compartment or under the vehicle, ensure that the hood is fully open, or opened to its secondary latch. When the hood is opened to the secondary latch, the vehicle will disable the remote start features from the key fob and OnStar mobile app. Failure to open the hood, or open the hood to the secondary latch while doing a repair in the engine compartment or under the vehicle can result in inadvertent vehicle starting which could result in personal injury or damage to a vehicle.
  4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  5. Remove the fuel tank assembly. Refer to Fuel Tank Replacement .
    6. Fig 1: Electrical Harness Connector
    GM2170279Courtesy of GENERAL MOTORS COMPANY
  6. Disconnect the electrical harness connector (2) from the secondary fuel tank module (1).
    7. Fig 2: Cam Lock Ring And Secondary Fuel Tank Module
    GM2170278Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The cam lock ring is a single use item and must be replaced after it was removed.

  7. Remove the cam lock ring (2) from the secondary fuel tank module (3) by rotating the cam lock ring (2) counter-clockwise using the fuel tank sender wrench CH-48482  fuel tank sender wrench (1).
  8. Discard the cam lock ring (2).
    9. Fig 3: Transfer Tube And Fuel Tank Module
    GM2170277Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    To release the transfer tube (4) from the secondary fuel tank module (1), squeeze the releasing buttons (5) on the transfer tube (4).

    NOTE:

    Note the orientation of the secondary fuel tank module (1) in relation to the fuel tank assembly (2).

    NOTE:

    Do not damage the fuel level sensor float rod (3) when removing the secondary fuel tank module (1) from the fuel tank.

  9. Carefully lift the secondary fuel tank module (1) from the fuel tank assembly (2), enough to disconnect the transfer tube (4) from the secondary fuel tank module (1).
  10. Disconnect the transfer tube (4) from the secondary fuel tank module (1).
  11. Carefully manoeuvre the secondary fuel tank module (1) from the fuel tank assembly (2).
    12. Fig 4: Primary Fuel Tank Module Seal Ring
    GM2169267Courtesy of GENERAL MOTORS COMPANY
  12. Remove the fuel tank seal (1) from the fuel tank assembly (2).
  13. Discard the fuel tank seal (1).
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