9-7X V8-5.3L (2005)
1. If re-using the old coolant heater, apply thread sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent to the threads.
Notice: Refer to Fastener Notice.
2. Install the coolant heater to the engine block.
Tighten the coolant heater to 50 Nm (37 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 (1) electrical connector.
4. Lower the vehicle.
5. Fill the cooling system. Refer to Cooling System Draining and Filling (LL8) (See: Cooling System/Service and Repair/Cooling System Draining
and Filling)Cooling System Draining and Filling (LH6) (See: Cooling System/Service and Repair/Cooling System Draining and Filling).
