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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 275 (Automatic Transmission - 4L60-E/4L65-E - Servicing) >> Removal & Installation >> TCC Solenoid, TCC PWM Solenoid & Wiring Harness >> Removal

TCC Solenoid, TCC PWM Solenoid & Wiring Harness: Removal

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  1. Raise and support the vehicle. Remove the transmission oil pan and the filter. See DRAINING & REFILLING  under LUBRICATION.
  2. Disconnect the transmission harness 20-way connector from the transmission internal harness pass-through connector. See Fig 1 . Depress both tabs on the connector and pull straight up, DO NOT pry the connector.
  3. Remove the 1-2 accumulator assembly. See ACCUMULATOR ASSEMBLY  .
  4. Disconnect the internal wiring harness electrical connectors from the following components:
    • Transmission fluid pressure switch. See Figure .
    • 1-2 shift control solenoid.
    • 2-3 shift control solenoid.
    • Pressure control solenoid.
    • TCC PWM solenoid.
    • 3-2 shift control solenoid.
  5. Remove the TCC PWM solenoid retainer. See Fig 2 .
  6. Remove the TCC PWM solenoid to access one of the TCC solenoid retaining bolts.
  7. Remove the pressure control solenoid retainer.
  8. Remove the pressure control solenoid. See Figure .
  9. Remove the TCC solenoid retaining bolts and the valve body bolts which retain the internal wiring harness. See Fig 3 .
  10. Using the seal protector retainer installer, release the pass-through electrical connector from the transmission case. See Fig 4 .
    1. Use the small end of the seal protector retainer installer over the top of the connector.
    2. Twist to release the 4 tabs retaining the connector.
    3. Pull the harness connector down through the transmission case.
  11. Remove the TCC solenoid (with "O" ring seal) and wiring harness.
  12. Inspect the TCC solenoid and wiring harness assembly for the following defects:
    • Damage. See Fig 5 .
    • Cracked connectors.
    • Exposed wires.
    • Loose pins.
Fig 1: Disconnecting & Connecting Transmission Harness Connector
G00057010Courtesy of GENERAL MOTORS CORP.
Fig 2: Removing & Installing TCC PWM Solenoid
G00056988Courtesy of GENERAL MOTORS CORP.
Fig 3: Removing & Installing Valve Body/TCC Solenoid Bolts
G00057011Courtesy of GENERAL MOTORS CORP.
Fig 4: Removing & Installing Internal Wiring Harness
G00089850Courtesy of GENERAL MOTORS CORP.
Fig 5: Identifying Internal Transmission Wire Harness
G00057012Courtesy of GENERAL MOTORS CORP.
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