Lumina V6-3.8L VIN K (1998)
Heater Core: Description and Operation
The heater core heats the air before it enters the vehicle. Engine coolant is circulated through the core to heat the outside air passing over the fins of the
core. The core is functional at all times (no water valve) and may be used to temper conditioned air in A/C mode, as well as heat or vent mode.
