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

ENGINE COOLANT TEMPERATURE (ECT) SENSOR REPLACEMENT

REMOVAL PROCEDURE




1. Drain the cooling system. Refer to Draining and Filling Cooling System (Static Fill) Draining and Filling Cooling System (Vac-N-Fill). Service and Repair
2. Remove the intake manifold cover.
3. Remove the air cleaner outlet duct.
4. Disconnect the fuel injector harness electrical connector from the engine coolant temperature (ECT) sensor.




5. Remove the ECT sensor.

INSTALLATION PROCEDURE

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




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

NOTE: Refer to Fastener Notice.

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




3. Connect the fuel injector harness electrical connector to the ECT sensor.
4. Install the air cleaner outlet duct.
5. Install the intake manifold cover.
6. Fill the cooling system. Refer to Draining and Filling Cooling System (Static Fill) Draining and Filling Cooling System (Vac-N-Fill). Service and Repair