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 bolt. Do not remove the engine block heater bolt.
5. Remove the engine block heater.
6. Clean the engine block heater opening.

Installation Procedure





1. Coat the following components with the lubricant GM PIN 12345996 or the equivalent:
- The engine block heater seal
- The cleaned surface of the engine block heater hole





2. Install the engine block heater. Position the engine block heater element at the 3 o'clock position (2), as shown.
Final installed position between 2 o'clock (1) and 4 o'clock (3) is acceptable.

Notice: Refer to Fastener Notice in Service Precautions.

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