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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1625 (Automatic Transmission - 4L60-E - Service, Removal & Installation) >> 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 Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the transmission filter. Refer to Automatic Transmission Fluid/Filter Replacement   . 
  2. Disconnect the transmission harness 20-way connector (1) from the transmission internal harness pass-through connector.

    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.
    Fig 1: Disconnecting Transmission Harness Connector
    G01953628Courtesy of GENERAL MOTORS CORP.
  3. Remove the 1-2 accumulator. Do not remove the spacer plate. Refer to Accumulator Assembly, Spacer Plate, And Gaskets   . 
  4. 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)
    • Torque converter clutch pulse width modulation (TCC PWM) solenoid (5)
    • 3-2 control solenoid (6)
      Fig 2: Disconnecting Internal Wiring Harness Electrical Connectors
      G01953629Courtesy of GENERAL MOTORS CORP.
  5. Remove the TCC PWM solenoid retainer.
  6. Remove the TCC PWM solenoid in order to access one of the TCC solenoid bolts.
    Fig 3: Removing TCC PWM Solenoid & Retainer
    G01953630Courtesy of GENERAL MOTORS CORP.
  7. Remove the pressure control solenoid retainer.
  8. Remove the pressure control solenoid.
    Fig 4: Removing Pressure Control Solenoid & Retainer
    G01953631Courtesy of GENERAL MOTORS CORP.
  9. Remove the TCC solenoid bolts and the valve body bolts which retain the internal wiring harness.
    Fig 5: Removing TCC Solenoid Bolts & Valve Body Bolts
    G01953632Courtesy of GENERAL MOTORS CORP.
  10. Using J 28458,  release the pass-through electrical connector from the transmission case.
    1. 10.1. Use the small end of the J 28458  over the top of the connector.
    2. 10.2. Twist in order to release the four tabs retaining the connector.
    3. 10.3. Pull the harness connector down through the transmission case.
  11. Remove the TCC solenoid (with O-ring seal) and wiring harness.
    Fig 6: Removing TCC Solenoid & Wiring Harness
    G01953633Courtesy of GENERAL MOTORS CORP.
  12. Inspect the TCC solenoid and wiring harness for the following defects:
    • Damage
    • Cracked connectors
    • Exposed wires
    • Loose pins
      Fig 7: Inspecting TCC Solenoid & Wiring Harness
      G01953634Courtesy of GENERAL MOTORS CORP.
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