Coolant Heater Replacement

Removal Procedure





1. Drain the cooling system. Refer to Draining and Filling Cooling System.
2. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
3. Disconnect the engine block heater cord from the engine block heater.
4. Loosen the engine block heater screw.
5. Remove the engine block heater.
6. Clean the engine block heater opening.

Installation Procedure





1. Coat the following components with the lubricant GM P/N 12345996 or the equivalent:
- The engine block heater seal
- The cleaned surface of the engine block heater hole
2. Position the heating element at the 3 O'clock position (2).
3. Install the engine block heater.

Notice: Refer to Fastener Notice in Service Precautions.

4. Tighten the engine block heater screw.
Tighten the engine block heater screw to 2 Nm (18 inch lbs.).
5. Connect the engine block heater cord to the engine block heater.
6. Lower the vehicle.
7. Fill the cooling system. Refer to Draining and Filling Cooling System.