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

1. Turn OFF the ignition.
2. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
3. Drain the cooling system below the level of the engine coolant temperature (ECT) sensor. Refer to Draining and Filling Cooling System in Engine Cooling.



4. Disconnect the ECT sensor harness connector.



5. Remove the ECT sensor.

Notice: Replacement components must be the correct part number for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect the operation of the component. Use the correct torque specification when installing components in order to avoid damage.

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

1. Coat the threads (only) with sealer GM P/N 9985253 or equivalent.



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 Engine Cooling.
5. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .