Engine Coolant Temperature Sensor Replacement 3.8L V6

Important: Care must be taken when handling the engine coolant temperature (ECT) sensor, damage to the sensor will affect proper operation of the fuel injection system.

1. Drain the engine coolant. Refer to Cooling System Draining and Filling .
2. Disconnect the coolant temperature sensor (1) electrical connector.
3. Remove the coolant temperature sensor (1).

1. Coat the sensor threads with sealer GM P/N 12346004 or equivalent.
2. Install the coolant temperature sensor (1) into the engine.
3. Tighten the coolant temperature sensor (1).

Tighten
Tighten the coolant temperature sensor (1) to 25 N·m (18 lb ft).

4. Connect the coolant temperature sensor (1) electrical connector.
5. Refill the cooling system. Refer to Cooling System Draining and Filling .

Engine Coolant Temperature Sensor Replacement 5.7L V8

Important: Care must be taken when handling the engine coolant temperature (ECT) sensor. Damage to the sensor will affect proper operation of the fuel injection system.

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Disconnect the coolant temperature sensor electrical connector.
3. Remove the number 1 spark plug wire.
4. Remove the coolant temperature sensor.

1. Coat the sensor threads with sealer GM P/N 12346004 or equivalent.
2. Install the coolant temperature sensor.
3. Tighten the coolant temperature sensor.

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

4. Install the number 1 spark plug wire.
5. Connect the coolant temperature sensor electrical connector.
6. Refill the cooling system. Refer to Cooling System Draining and Filling .