Silverado Classic 2500 2WD V8-8.1L (2007)
Engine Block Heater: Service and Repair
Coolant Heater Replacement (8.1L)
Removal Procedure
1. Drain the cooling system. Refer to Draining and Filling Cooling System (Static Fill) Draining and Filling Cooling System (w/RPO HP2) Draining
and Filling Cooling System (Vac-N-Fill).
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.
