Coolant Temperature Sensor/Switch (For Computer): Service and Repair

REMOVAL PROCEDURE
1. Turn OFF the ignition.
2. Relieve the coolant pressure.
3. Disconnect the Engine Coolant Temperature (ECT) sensor electrical connector.
4. Use a deep well socket and an extension in order to remove the sensor.

INSTALLATION PROCEDURE
1. Coat the ECT sensor threads with sealer GM P/N 9985253 or equivalent.

NOTE: Refer to Fastener Notice in Service Precautions.

2. Install the sensor in the engine.

Tighten
Tighten the sensor to 23 N.m (17 lb ft).

3. Connect the ECT sensor electrical connector.
4. Start the engine.
5. Inspect for leaks.
6. Inspect the coolant level.