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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 496 (Automatic Transmission - 2ML70 - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Wiring Harness Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the transmission fluid filter and auxiliary fluid pump filter. Refer to Automatic Transmission Fluid Filter and Auxiliary Fluid Pump Filter Replacement .
  2. Disconnect the transmission 24 Way connector.
  3. Disconnect the transmission 16 Way connector.
  4. Remove the transmission electrical connector passage sleeve. Refer to Automatic Transmission Electrical Connector Passage Sleeve Replacement .
    5. Fig 1: Control Solenoid Valve Body, Wiring Harness Connector & Retainer
    GM2063158Courtesy of GENERAL MOTORS COMPANY
  5. Remove the control wiring harness from the wire harness retainer (2).
  6. Remove the control wiring harness connector (1) from the wire harness retainer.
  7. Disconnect the control wiring harness from the solenoid valve body (3).
  8. Disconnect the manual shift shaft position switch connector.
  9. Disconnect the output shaft speed sensor connector.
    10. Fig 2: Manual Shift Detent Spring Bolt, Manual Shift Detent Spring, Control Valve Upper Body Bolts, Control Valve Upper Body & Fluid Pump Seals
    GM2063165Courtesy of GENERAL MOTORS COMPANY
  10. Remove the manual shift detent spring bolt (4).
  11. Remove the manual shift detent spring (5).
    12. Fig 3: View Of Control Valve Upper Body & Bolts
    GM2199292Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do not remove all the bolts in the control valve body assembly. Remove only the bolts indicated.

  12. Remove the 4 control valve upper body bolts (4) M6 x 1.0 x 65.
  13. Remove the 2 control valve upper body bolts (5) M6 x 1.0 x 80.
  14. Remove the control (w/body and TCM) valve assembly (6).
  15. Remove the automatic transmission (A/T) fluid pump seal assembly (7).

    Discard the A/T fluid pump seal.

  16. Remove the hybrid low, 1-2 clutch regulator valve seals (8).

    Discard the clutch regulator valve seals.

    17. Fig 4: View Of Drive Motor Connectors & Control Wiring Harness
    GM2199293Courtesy of GENERAL MOTORS COMPANY
  17. Disconnect the 2 drive motor connectors from the control wiring harness.
  18. Remove the control wiring harness (2) and O-ring seal (1). Discard the O-ring seal.
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