Coolant Heater Replacement L26

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Disconnect the coolant heater cord from the coolant heater.



3. Remove the coolant heater.
4. Remove and clean any burrs, compound, paint, or rough spots from the core plug hole.

1. Apply sealant GM  P/N 12346004, (Canadian P/N 10953480) or equivalent to the coolant heater.

Notice: Refer to Fastener Notice in the Preface section.

2. Install the coolant heater.

Tighten
Tighten the coolant heater to 50 N·m (37 lb ft).





Notice: The heater cord must not touch the engine, hot pipes, manifold, or any moving parts. Route the cord to the left front of the engine compartment securing with tie straps as necessary to prevent damage.

3. Connect the coolant heater cord to the coolant heater.
4. Fill the cooling system. Refer to Cooling System Draining and Filling .