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

ENGINE COOLANT TEMPERATURE (ECT) SENSOR REPLACEMENT

REMOVAL PROCEDURE




1. Partially drain the cooling system. Refer to Draining and Filling Cooling System. Service and Repair
2. Disconnect the engine coolant temperature (ECT) sensor electrical connector (1).




3. Remove the ECT sensor.

INSTALLATION PROCEDURE




1. Apply the thread sealant GM P/N 12345382 (Canadian P/N 10953489), or equivalent to the sensor threads.

IMPORTANT: Tap out the sensor mounting hole in the engine head to remove any thread sealant residue. Clean any sealant residue from the old sensor and apply the RTV sealant to threads if old the sensor is going to be reused.

NOTE: Refer to Fastener Notice.

2. Install the ECT sensor.

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




3. Connect the ECT sensor electrical connector (1).
4. Fill the cooling system as needed. Refer to Draining and Filling Cooling System. Service and Repair