Sierra Classic 2500 4WD V8-8.1L (2007)
Torque Converter Clutch Solenoid: Service and Repair
Torque Converter Clutch Pulse Width Modulation Solenoid, Torque Converter Clutch Solenoid, and Wiring Harness
Tools Required
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J 28458 Seal Protector Retainer Installer
Removal Procedure
1. Remove the transmission filter. Refer to Automatic Transmission Fluid and 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.
3. Important:
Removal of the valve body is not necessary for the following procedure.
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:
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Transmission fluid pressure switch (1)
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1-2 shift control solenoid (2)
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2-3 shift control solenoid (3)
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Pressure control solenoid (4)
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Torque converter clutch pulse width modulation (TCC PWM) solenoid (5)
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3-2 control solenoid (6)
