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

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  1. Install the wiring harness and TCC solenoid assembly with a new O-ring seal to the transmission. Install the pass-through electrical connector to the transmission case. See Fig 6 .
  2. Install the valve body bolts which retain the internal wiring harness and install the TCC solenoid retaining bolts. See Fig 5 . Tighten the control valve body retaining bolts to specification. See TORQUE SPECIFICATIONS  .
  3. Tighten the TCC solenoid retaining bolts to specification. See TORQUE SPECIFICATIONS  .
  4. Install the pressure control solenoid. See Fig 4 . Ensure the electrical tabs are facing outboard. Install the pressure control solenoid retainer and retaining bolt. Tighten the pressure control solenoid retaining bolt to specification. See TORQUE SPECIFICATIONS  .
  5. Install the TCC PWM solenoid to the control valve body. See Fig 3 . Install the TCC PWM solenoid retainer.
  6. Connect the internal wiring harness electrical connectors to 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 .
  7. Connect the transmission harness 20-way connector to the transmission pass-through connector. Align the arrows on each half of the connector and insert straight down. See Fig 2 .
  8. Install the transmission oil pan and filter. See DRAINING & REFILLING  under LUBRICATION. Lower the vehicle. Fill transmission with appropriate fluid to proper level. See LUBRICATION  .
Fig 1: Identifying Internal Transmission Wire Harness
G00057012Courtesy of GENERAL MOTORS CORP.
Fig 2: Disconnecting & Connecting Transmission Harness Connector
G00057010Courtesy of GENERAL MOTORS CORP.
Fig 3: Removing & Installing TCC PWM Solenoid
G00056988Courtesy of GENERAL MOTORS CORP.
Fig 4: Removing/Installing Pressure Control Solenoid
G00056998Courtesy of GENERAL MOTORS CORP.
Fig 5: Removing & Installing Valve Body/TCC Solenoid Bolts
G00057011Courtesy of GENERAL MOTORS CORP.
Fig 6: Removing & Installing Internal Wiring Harness
G00089850Courtesy of GENERAL MOTORS CORP.
Fig 7: Inspecting Internal Wiring Harness
G00057012Courtesy of GENERAL MOTORS CORP.
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