K 1500 Truck 4WD V8-6.5L DSL Turbo VIN S (1999)
Heater Core: Description and Operation
HEATER CORE - MANUAL HVAC SYSTEM
In any air conditioning mode, the heater core heats the cool, dehumidified air in order to achieve the desired temperature. The position of the control
assembly temperature rotary knob determines how much heat is added to the incoming air.
