Coolant Heater Replacement

Coolant Heater Replacement (LZ4 and LZ9) (3.5L)

Removal Procedure




1. Drain the cooling system. Refer to Cooling System Draining and Filling (GE 47716 Fill) Cooling System Draining and Filling (GE 47716 Fill)Cooling System Draining and Filling (LY7, LZE, LZ4, LZ9) Cooling System Draining and Filling (GE 47716 Fill).
2. Disconnect the engine coolant heater cord from the engine coolant heater.




3. Remove the engine coolant heater.
4. Clean the engine coolant heater opening.

Installation Procedure




1. Apply sealer GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the threads of the engine coolant heater, if necessary.
Caution: Refer to Fastener Caution Fastener Caution.

2. Install the engine coolant heater.

Tighten the coolant heater to 60 Nm (44 lb ft).




3. Connect the engine coolant heater cord to the engine coolant heater.
4. Lower the vehicle.
5. Fill the cooling system. Refer to Cooling System Draining and Filling (GE 47716 Fill) Cooling System Draining and Filling (GE 47716 Fill)Cooling System Draining and Filling (LY7, LZE, LZ4, LZ9) Cooling System Draining and Filling (GE 47716 Fill).
6. Inspect for leaks.