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Home >> Chevrolet >> 2024 >> Tahoe Commercial, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 10L80 (MHS MHU MQC) - Repair Instructions - On Vehicle (1 Of 2) >> Repair Instructions - On Vehicle >> Automatic Transmission Wiring Harness Replacement >> Removal Procedure

Removal Procedure

  1. GM5427502Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Fluid Filter (2) - Remove - Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement (L84/L87) , or Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement (LM2) 

  2. GM5428678Courtesy of GENERAL MOTORS COMPANY

    Control Valve Upper Body Bolt (1) - Remove

  3. Automatic Transmission Auxiliary Fluid Pump Outlet Pipe (2) - Remove
  4. Automatic Transmission Auxiliary Fluid Pump Outlet Pipe Seal (3) - Remove and DISCARD
  5. Automatic Transmission Auxiliary Fluid Pump Seal (4) - Remove and DISCARD
  6. GM5428680Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Auxiliary Fluid Pump Bolt (1) - Remove [3x]

  7. Disconnect the electrical connector.
  8. Automatic Transmission Auxiliary Fluid Pump (2) - Remove
  9. GM5111981Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The control valve solenoid body bolts are marked by arrows in the valve body casting.

    Control Valve Solenoid Body Bolt (1) - Remove [2x]

  10. Control Valve Solenoid Body Bolt (2) - Remove and DISCARD [3x]
  11. Control Valve Solenoid Body Bolt (3) - Remove [2x]
  12. GM5613352Courtesy of GENERAL MOTORS COMPANY

    Disconnect the park inhibitor solenoid electrical connector (1).

  13. Park Inhibitor Solenoid (2) - Remove
  14. Unlock the main control wiring harness connector latch (3).
  15. Disconnect the transmission wiring harness (4).
    16. NOTE:

    Do not disassemble the control valve body assembly. The internal parts are NOT serviceable.

  16. Control Valve Body Assembly (5) - Remove
  17. GM5654262Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Fluid Pump Seal (1) - Remove and DISCARD

  18. GM5913159Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Control Wiring Harness Clip Bracket Bolt (1) - Remove [2x]

  19. Automatic Transmission Control Wiring Harness Retainer (2) - Remove [2x]
    20. NOTE:

    Due to limited space, DT-52089-1  Wiring Harness Pass Through Connector Removal Tool (3) the MUST be inserted into the DT-52089-2  Wiring Harness Pass Through Connector Removal Tool (4) prior to installing it onto the bulkhead connector.

  20. Install the DT-52089-1  Wiring Harness Pass Through Connector Removal Tool (3) into the DT-52089-2  Wiring Harness Pass Through Connector Removal Tool then install the DT-52089-1  Wiring Harness Pass Through Connector Removal Tool with the DT-52089-2  Wiring Harness Pass Through Connector Removal Tool onto bulkhead connector.
  21. Ensure that the DT-52089-1  Wiring Harness Pass Through Connector Removal Tool (3) is pushed all the way on, and flush with the transmission case.
  22. Push the DT-52089-2  Wiring Harness Pass Through Connector Removal Tool (4) into the DT-52089-1  Wiring Harness Pass Through Connector Removal Tool (4), and remove the bulkhead connector from the case.
  23. Disconnect the electrical connectors.
    24. NOTE:

    Ensure the connector is free of debris and dirt.

  24. Automatic Transmission Wiring Harness (6) - Remove
  25. GM5428709Courtesy of GENERAL MOTORS COMPANY

    Wiring Harness Connector Seal-O-Ring (1) - Remove and DISCARD [2x]

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