Avalanche 2500 4WD V8-8.1L VIN G (2003)
Engine Block Heater: Service and Repair
Coolant Heater
Coolant Heater Replacement
Removal Procedure
1. Drain the cooling system/engine block.
2. Raise and suitably support the vehicle. Refer to Vehicle Lifting. See: Maintenance/Vehicle Lifting
3. Remove the oil pan skid plate bolts and plate.
4. Disconnect the coolant heater electrical connector.
5. Remove the coolant heater from the engine block.
Installation Procedure
1. If reusing the old coolant heater, apply sealant GM P/N 12346004, (Canadian P/N 10953480), or equivalent to the threads.
