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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1449 (Automatic Transmission - 4L60-E/4L65-E (Introduction, Service & Replacement)) >> Repair Instructions >> Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid, TCC Solenoid, and Wiring Harness >> Removal Procedure

Removal Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. 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. Fig 1: View Of Transmission Harness 20-Way Connector
    GM173659Courtesy of GENERAL MOTORS CORP.
  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.

    4. 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. Fig 2: Identifying Valve Body Electrical Connections
    GM181573Courtesy of GENERAL MOTORS CORP.
  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)
    6. Fig 3: View Of TCC PWM Solenoid & Retainer
    GM298154Courtesy 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.
    8. Fig 4: Locating Pressure Control Solenoid & Retainer
    GM298162Courtesy of GENERAL MOTORS CORP.
  8. Remove the pressure control solenoid retainer.
  9. Remove the pressure control solenoid.
    10. Fig 5: View Of TCC Solenoid Bolts & Valve Body Bolts
    GM298139Courtesy of GENERAL MOTORS CORP.
  10. Remove the TCC solenoid retaining bolts and the valve body bolts which retain the internal wiring harness.
    11. Fig 6: View Of TCC Solenoid & Wiring Harness
    GM71463Courtesy of GENERAL MOTORS CORP.
  11. Using J 28458  , release the pass-through electrical connector from the transmission case. See Special Tools and Equipment .
    1. Use the small end of the J 28458  over the top of the connector. See Special Tools and Equipment .
    2. Twist in order to release the four tabs retaining the connector.
    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.
    13. Fig 7: View Of TCC Solenoid & Wiring Harness
    GM155017Courtesy of GENERAL MOTORS CORP.
  13. Inspect the TCC solenoid and wiring harness assembly for the following defects:
    • Damage
    • Cracked connectors
    • Exposed wires
    • Loose pins
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