Coolant Heater Replacement

Coolant Heater Replacement (3.1L)

Removal Procedure
1. Drain the cooling system.
2. Raise and support the vehicle. Refer to Vehicle Lifting.
3. Disconnect the engine coolant heater cord from the engine coolant heater.
4. Loosen the engine coolant heater bolt. Do not remove the engine coolant heater bolt.





5. Remove the engine coolant heater.
6. Clean the engine coolant heater opening.

Installation Procedure
1. Apply a coat of GM P/N 12346004 or equivalent to the following:
^ The engine block heater seal
^ The cleaned surface of the engine block heater hole





2. Position the engine coolant heater element at the 3 o'clock position (2).
3. Install the engine coolant heater.

Notice: Refer to Fastener Notice in Service Precautions.

4. Tighten the engine coolant heater bolt.
^ Tighten the engine coolant heater bolt to 2 Nm (18 inch lbs.).
5. Connect the engine coolant heater cord to the engine coolant heater.
6. Lower the vehicle.
7. Fill the cooling system.
8. Inspect for leaks.