Diesel Data
: Automotive Repair
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Chevy Truck
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1999
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Express 1 Ton Van V8-5.7L VIN R
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Repair and Diagnosis
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Heating and Air Conditioning
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Air Door
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Description and Operation
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Heating and Ventilation
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Mode Valves Description
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General Information
General Information
The heater system provides the following 3 basic operating modes:
^
VENT
^
HTR
^
DEFROST
The system also can combine the features of HTR, and DEFROST into 1 position called BLEND.