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Buick
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1999
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Regal V6-3.8L VIN K
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Repair and Diagnosis
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Heating and Air Conditioning
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Description and Operation
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HVAC System - Manual
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HVAC Air Delivery Circuit Description
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Air Delivery
Air Delivery
Control of air through the system is regulated by vacuum. At various positions on the
heater-A/C control
, mode valves mix and direct cooled, heated and outside air through the
air ducts
.