Yukon XL 2500 2WD V8-8.1L VIN G (2004)
Installation Procedure
1. If reusing the old coolant heater, apply sealant GM P/N 12346004, (Canadian P/N 10953480), or equivalent to the threads.
Notice: Refer to Fastener Notice in Service Precautions.
2. Install the coolant heater into the engine block.
Tighten the coolant heater to 60 Nm (40 ft. lbs.).
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 electrical connector.
4. Fill the cooling system/engine block.