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Home >> Cadillac >> 2018 >> Escalade Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Automatic Transmission - 6L80 (MYC) Or 6L90 (MYD) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Control Solenoid Valve And Transmission Control Module Assembly Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban 3500 HD, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Filter Plate Assembly
    GM1758098Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Inspect the 4 filter plate retaining tabs on the control solenoid valve assembly. A broken or missing tab may not adequately secure the filter plate to the control solenoid valve assembly.

  1. Install a NEW filter plate assembly (1).
  2. Fig 2: Control Solenoid Valve Assembly Bolts
    GM1758104Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Note the locator pin on the control valve lower body assembly.

  3. Align the control solenoid valve assembly (1) to the control valve lower body assembly.
  4. Install the 2 bolts (2), through the "heat sink" side of the control solenoid valve assembly (1). Hand tighten only.
  5. Fig 3: Control Solenoid Valve Assembly To Control Valve Body Assembly Bolts
    GM1758109Courtesy of GENERAL MOTORS COMPANY
  6. Install the 4 bolts (1) and 5 bolts (2) securing the control solenoid valve assembly to the control valve lower body assembly. Hand tighten only.
  7. Fig 4: Manual Shift Shaft Position Switch Assembly
    GM1758114Courtesy of GENERAL MOTORS COMPANY
  8. Install the manual shift shaft position switch assembly (1). Align the switch activator slide with the manual valve link. Secure with 1 bolt (3). Hand tighten only.
  9. NOTE:

    The wiring harness clip (4) on the manual shift shaft position switch does not need to be replaced if damaged or missing. The clip functions only as a manufacturing assembly aid to keep the harness clear during an automated bolt installation process. If the clip is damaged, simply remove and discard.

  10. Connect and lock the manual shift shaft position switch electrical connector (5) to the control solenoid valve assembly and attach the wiring harness clip (4).
  11. Fig 5: Control Solenoid Valve Assembly Bolt Tightening Sequence
    GM1758118Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Bolt torque sequencing is critical to the proper function of the control solenoid valve assembly. Failure to follow the required sequencing may result in transmission malfunction.

    CAUTION:

    Refer to Fastener Caution .

    NOTE:

    When following the tightening sequence, skip over bolts 10, 11, 12, 13 and 15. These bolts are not removed for this procedure.

  12. Tighten all bolts in the sequence shown. The 2 "heat sink" bolts (17, 18) must be tightened last.

    Tighten bolts to 8 N.m (71 lb in).

  13. Fig 6: Control Solenoid Valve Assembly
    GM1754911Courtesy of GENERAL MOTORS COMPANY
  14. Inspect the contact area between the "heat sink" area of the control solenoid valve assembly (1) and the valve body. There should be no visible gap. If a gap exists, loosen all 18 bolts and retighten in the sequence shown.
  15. Fig 7: Speed Sensor Wiring Harness Clips
    GM1758854Courtesy of GENERAL MOTORS COMPANY
  16. Inspect the 2 input and output speed sensor wiring harness clips (1) for damage. Replace if damaged.
  17. Fig 8: Speed Sensor Electrical Connector
    GM1758085Courtesy of GENERAL MOTORS COMPANY
  18. Connect the speed sensor electrical connector (2) to the control solenoid valve assembly.
  19. Fig 9: Valve Body Assembly
    GM1685819Courtesy of GENERAL MOTORS COMPANY
  20. Install the upper and lower control valve body assembly. Refer to Control Valve Lower Body and Upper Body Replacement .
  21. Install the electrical connector passage sleeve. Refer to Automatic Transmission Electrical Connector Passage Sleeve Replacement .
  22. Fig 10: Transmission Oil Pan And Gasket
    GM1649733Courtesy of GENERAL MOTORS COMPANY
  23. Install the transmission oil pan and filter. Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement .
  24. If a NEW TCM has been installed into the vehicle, the NEW module needs to be reprogrammed. Refer to Service Programming System (SPS) .
  25. NOTE:

    The Service Fast Learn Adapts procedure must be performed when one of the following repairs have been made to the vehicle. Failure to perform the procedure after one of the following repairs may result in poor transmission performance, as well as transmission DTCs being set:

    • Transmission internal service/overhaul
    • Valve body repair or replacement
    • Control solenoid valve assembly replacement
    • TCM software/calibration update
    • Any service in response to a shift quality concern
  26. Perform the Reset Transmission Adapts. Refer to Reset Transmission Adapts .