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

REMOVAL PROCEDURE




1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Drain the engine coolant. Refer to Draining and fitting Cooling System in Engine Cooling.
3. Lower the vehicle.
4. Disconnect the electrical connector from the Engine Coolant Temperature (ECT) sensor.

NOTE: Refer to Handling Coolant Sensor Notice in Cautions and Notices.




5. Remove the ECT sensor.

INSTALLATION PROCEDURE




NOTE: Refer to Handling Coolant Sensor Notice in Cautions and Notices.

1. Coat the ECT sensor threads with sealer GM P/N 12346004 or the equivalent.

NOTE: Refer to fastener Notice in Cautions and Notices.

2. Install the ECT sensor.

Tighten
Tighten the ECT sensor to 20 N.m (15 lb ft).




3. Connect the ECT sensor electrical connector.
4. Refill the engine coolant. Refer to Draining and fitting Cooling System in Engine Cooling.
5. Start the engine and check for leaks.
6. Reinspect the engine coolant level. Refer to Draining and Filling Cooling System in Engine Cooling.