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GMC
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1984
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Forward Control 4.8 T, Standard
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Repair and Diagnosis
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Heating, Ventilation & A/C (HVAC)
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HVAC Control Systems
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Heater System
Heater System
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Description
Operation
System Controls
Temperature Control Lever
Mode Control Lever (Standard System)
Mode Control Lever (Optional System S" Blazer & Pickup Models)
Blower Control
Auxiliary Heater Blower Switch
Adjustments
Heater System
Van Models
"S" Blazer & Pickup Models
Trouble Shooting & Diagnosis
Component Replacement
Control Panel
Replacement (Blazer & Pickup Models)
Replacement (Van Models)
Replacement ("S" Blazer & Pickup Models)
Heater Core
Notes
Replacement (Blazer & Pickup Models)
Replacement (Van Models)
Replacement ("S" Blazer & Pickup Models)
Blower Motor
Replacement (Blazer, Pickup & Van Models)
Replacement ("S" Blazer & Pickup Models)
Control Cables
Replacement (Blazer & Pickup Models)
Replacement (Van Models)
Replacement ("S" Blazer & Pickup Models)
Wiring Diagrams