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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 918 (Automatic Transmission Service, Removal & Installation - 4L60-E) >> Repair Instructions >> Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid, TCC Solenoid, and Wiring Harness >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
  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.

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

    Fig 1: Disconnecting Transmission Harness 20-Way Connector
    G01980034Courtesy of GENERAL MOTORS CORP.

    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 Components
      G01980035Courtesy 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
    G01980036Courtesy of GENERAL MOTORS CORP.
  8. Remove the pressure control solenoid retainer.
  9. Remove the pressure control solenoid.
    Fig 4: Pressure Control Solenoid Retainer
    G01980037Courtesy 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
    G01980038Courtesy 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 & Wiring Harness Assembly
    G01980039Courtesy of GENERAL MOTORS CORP.
  13. Inspect the TCC solenoid and wiring harness assembly for the following defects:
    • Damage
    • Cracked connectors
    • Exposed wires
    • Loose pins
      Fig 7: Inspecting TCC Solenoid & Wiring Harness Assembly
      G01980040Courtesy of GENERAL MOTORS CORP.
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