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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 80 (Automatic Transmission Servicing) >> Removal & Installation >> TCC Solenoid, TCC PWM Solenoid & Wiring Harness (4L60-E) >> Removal

TCC Solenoid, TCC PWM Solenoid & Wiring Harness (4L60-E): Removal

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  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 Figure . 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 (4L60-E)  .
  4. Disconnect the internal wiring harness electrical connectors from the following components: Transmission fluid pressure switch, 1-2 shift control solenoid, 2-3 shift control solenoid, pressure control solenoid, TCC PWM solenoid and 3-2 shift control solenoid. See Figure .
  5. Remove the TCC PWM solenoid retainer. Remove the TCC PWM solenoid to access one of the TCC solenoid retaining bolts. See Figure .
  6. Remove the pressure control solenoid retainer. Remove the pressure control solenoid. See Figure . Remove the TCC solenoid retaining bolts and the valve body bolts which retain the internal wiring harness. See Figure .
  7. Using power piston seal protector and diaphragm retainer installer, release the pass-through electrical connector from the transmission case. See Figure . Use the small end of the power piston seal protector and diaphragm retainer installer over the top of the connector. Twist to release the 4 tabs retaining the connector. Pull the harness connector down through the transmission case.
  8. Remove the TCC solenoid (with O-ring seal) and wiring harness assembly from the transmission case.
  9. Inspect the TCC solenoid and wiring harness assembly for the following defects: Damage, cracked, connectors, exposed wires and loose pins. See Figure .
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