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

REMOVAL PROCEDURE

NOTE: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.

CAUTION: Refer to Battery Disconnect Caution In Service Precautions.




1. Disconnect the negative battery cable.
2. Loosen the wing nuts on the air cleaner cover and air cleaner outlet duct.
3. Move the air intake assembly aside.

CAUTION: Allow sufficient time for the engine to cool before removing the ECT sensor. A hot engine may cause an excessive coolant loss or a personal injury.

4. Relieve the coolant pressure.
5. Drain the cooling system below the level of the ECT sensor. Refer to Draining and Filling Cooling System in Cooling System.




6. Disconnect the ECT sensor harness connector.




7. Remove the ECT sensor.

INSTALLATION PROCEDURE




1. Coat the threads (only) with GM P/N 12346004 sealer or equivalent.

NOTE: Refer to Component Tightening Notice in Service Precautions.

2. Install the ECT sensor in the engine.

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




3. Connect the ECT sensor harness connector.
4. Refill the cooling system. Refer to Draining and Filling Cooling System in Cooling System.




5. Install the air cleaner outlet duct assembly and tighten the wing nuts.
6. Connect the negative battery cable.