Sierra 3500 2WD V8-8.1L VIN G (2005)
Engine Block Heater: Service and Repair
Coolant Heater
Coolant Heater Replacement (8.1L)
Removal Procedure
1. Drain the cooling system.
2. Disconnect the block heater cord from the block heater.
3. Remove the engine block heater.
Installation Procedure
1. Apply sealant GM P/N 12346004, (Canadian P/N 10953480), or equivalent to the threads of the engine block heater.