Coolant Temperature Sensor/Switch (For Computer): Service and Repair
REMOVAL PROCEDURENOTE: 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. Remove the air cleaner assembly.
CAUTION: To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot. The cooling system will release scalding fluid and steam under pressure if radiator cap or surge tank cap is removed while the engine and radiator are still hot.
3. Relieve the cooling system pressure.
4. Drain the cooling system below the level of the Engine Coolant Temperature (ECT) sensor. Refer to Draining and Filling Cooling System in Cooling System.
5. Disconnect the ECT sensor harness connector.
6. Remove the ECT sensor.
INSTALLATION PROCEDURE
1. Coat the threads (only) with sealer GM P/N 9985253 or equivalent.
NOTE: Refer to Component Tightening Notice in Service Precautions.
2. Install the ECT sensor.
Tighten
Tighten the ECT sensor to 13 N.m (10 lb ft).
3. Connect the ECT sensor harness connector.
4. Refill the cooling system. Refer to Draining and Filling Cooling System in Coolimg System.
5. Install the air cleaner assembly.
6. Connect the negative battery cable.