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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 4L60-E/4L65-E (Service & Replacement) >> Repair Instructions >> Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid, TCC Solenoid, and Wiring Harness >> Removal Procedure

Removal Procedure

  1. Raise and support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
  2. Remove the transmission oil pan and the filter. Refer to AUTOMATIC TRANSMISSION FLUID/FILTER REPLACEMENT .
  3. Disconnect the transmission harness 20-way connector from the transmission internal harness pass-through connector.
    Fig 1: Disconnecting Transmission Harness 20-Way Connector From Transmission Internal Harness Pass-Through Connector
    G01565904Courtesy of GENERAL MOTORS CORP.

    Depress both tabs on the connector and pull straight up; do not pry the connector.

    Important:  Removal of the valve body is not necessary for the following procedure.

  4. Remove the 1-2 accumulator assembly. Do not remove the spacer plate. Refer to ACCUMULATOR ASSEMBLY, SPACER PLATE, AND GASKETS .
  5. Disconnect the internal wiring harness electrical connectors from 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)
      Fig 2: Disconnecting Internal Wiring Harness Electrical Connectors From Located Components
      G01565905Courtesy of GENERAL MOTORS CORP.
  6. Remove the TCC PWM solenoid retainer.
  7. Remove the TCC PWM solenoid in order to access one of the TCC solenoid retaining bolts.
    Fig 3: TCC PWM Solenoid
    G01565906Courtesy of GENERAL MOTORS CORP.
  8. Remove the pressure control solenoid retainer.
  9. Remove the pressure control solenoid.
    Fig 4: Pressure Control Solenoid
    G01565907Courtesy of GENERAL MOTORS CORP.
  10. Remove the TCC solenoid retaining bolts and the valve body bolts which retain the internal wiring harness.
    Fig 5: TCC Solenoid Retaining Bolts & Valve Body Bolts
    G01565908Courtesy of GENERAL MOTORS CORP.
  11. Using J 28458  , release the pass-through electrical connector from the transmission case.
    1. 11.1. Use the small end of the J 28458  over the top of the connector.
    2. 11.2. Twist in order to release the four tabs retaining the connector.
    3. 11.3. Pull the harness connector down through the transmission case.
  12. Remove the TCC solenoid (with O-ring seal) and wiring harness assembly from the transmission case.
    Fig 6: TCC Solenoid (With O-Ring Seal) & Wiring Harness Assembly
    G01565909Courtesy of GENERAL MOTORS CORP.
  13. Inspect the TCC solenoid and wiring harness assembly for the following defects:
    • Damage
    • Cracked connector
    • Exposed wires
    • Loose pins
Fig 7: TCC Solenoid & Wiring Harness Assembly
G01565910Courtesy of GENERAL MOTORS CORP.
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