Grand Prix V6-3.8L VIN 2 (2004)
Engine Block Heater: Service and Repair
Coolant Heater
Removal Procedure
1. Drain the cooling system.
2. Raise and support the vehicle.
3. Disconnect the coolant heater cord from the coolant heater.
4. Loosen the bolt at the coolant heater but DO NOT remove the coolant heater bolt.
5. Remove the coolant heater.
6. Remove and clean any burrs, compound, paint, or rough spots from the core plug hole.
Installation Procedure
1. Apply GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the following:
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Engine block heater seal
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Cleaned surface of the engine block heater hole
2. Install the coolant heater by pushing tight to the block.
