Operation CHARM
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Buick
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1987
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Electra V6-231 3.8L VIN 3 FI
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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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Air Door Actuator / Motor
Air Door Actuator / Motor
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Description and Operation
Automatic Climate Controls
Manual Mechanical Controls
Testing and Inspection
Initial Inspection and Diagnostic Overview
System Check
System Diagnosis
Troubleshooting Hints
Component Tests and General Diagnostics
Locations
Defrost Valve Vacuum Motor
Lower Mode Valve Vacuum Actuator
Outside Air Valve Vacuum Actuator
Upper Mode Valve Vacuum Actuator
Actuator (A/C Defrost)
Actuator (Mode)
Actuator (Outside Air Valve)
A/C Defog Valve Actuator
A/C Heater Vacuum Motor BI-Directional
Air Inlet Door Vacuum Motor
Service and Repair
Defroster Vacuum Diaphragm Replace
Actuator (A/C Defrost)
Actuator (Mode)
Actuator (Outside Air Valve)
Valve (Air Mixture)
Diagrams
Technical Service Bulletins
