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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Introduction (2 Of 2)) >> Repair Instructions >> Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid, TCC Solenoid, and Wiring Harness >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Install the wiring harness and TCC solenoid with a new O-ring seal to the transmission.
    Fig 1: View Of TCC Solenoid & Wiring Harness
    GM71463Courtesy of GENERAL MOTORS CORP.
  2. Install the pass-through electrical connector to the transmission case.
    3. NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
    Fig 2: View Of TCC Solenoid Bolts & Valve Body Bolts
    GM298139Courtesy of GENERAL MOTORS CORP.
  3. Install the valve body bolts which retain the internal wiring harness and install the TCC solenoid bolts.

    Tighten: 

    • Tighten the control valve body bolts to 11 N.m (97 lb in).
    • Tighten the TCC solenoid bolts to 11 N.m (97 lb in).

    4. IMPORTANT: When installing the pressure control solenoid, the electrical connector (2) must be in the position shown.
    Fig 3: View Of Pressure Control Solenoid & Components
    GM1239566Courtesy of GENERAL MOTORS CORP.
  4. Install the pressure control solenoid (377).
  5. Install the pressure control solenoid retainer (378) and retainer bolt (364A).

    Tighten:  Tighten the bolt to 11 N.m (97 lb in).

    6. Fig 4: View Of TCC PWM Solenoid & Retainer
    GM298154Courtesy of GENERAL MOTORS CORP.
  6. Install the TCC PWM solenoid to the control valve body.
  7. Install the TCC PWM solenoid retainer.
    8. Fig 5: Identifying Valve Body Electrical Connections
    GM181573Courtesy of GENERAL MOTORS CORP.
  8. Connect the internal wiring harness electrical connectors to the following components:
    • Transmission fluid pressure switch (1)
    • 1-2 shift control solenoid (2)
    • 2-3 shift control solenoid (3)
    • Pressure control solenoid (4)
    • TCC PWM solenoid (5)
    • 3-2 control solenoid (6)
  9. Install the 1-2 accumulator. Refer to Accumulator Assembly, Spacer Plate, and Gaskets .
  10. Connect the transmission harness 20-way connector (1) to the transmission pass-through connector.

    Align the arrows on each half of the connector and insert straight down.

    Fig 6: View Of Transmission Harness 20-Way Connector & VSS Electrical Connector
    GM858994Courtesy of GENERAL MOTORS CORP.
  11. Install the transmission filter. Refer to Automatic Transmission Fluid/Filter Replacement .
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