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GMC
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1985
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Jimmy 5.7 L
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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" Models & Astro Van Models)
Blower Control
Auxiliary Heater Blower Switch
Adjustments
Control Cables
Blazer & Pickup Models
"G" Series & Astro Van Models
"S" Blazer & Pickup Models
Trouble Shooting & Diagnosis
Component Replacement
Control Panel
Removal & Installation (Blazer, Pickup & Astro Van Models)
Removal & Installation ("G" Series Van Models)
Replacement ("S" Models)
Heater Core
Notes
Removal & Installation (Blazer & Pickup Models)
Removal & Installation ("G" Series Van Models)
Removal & Installation ("S" Models)
Removal & Installation (Astro Van Models)
Blower Motor
Removal & Installation Blazer, Pickup & "G" Series Van Models)
Removal & Installation ("S" Models)
Removal & Installation (Astro Van Models)
Control Cables
Removal & Installation (Blazer & Pickup Models)
Removal & Installation ("G" Series Van Models)
Removal & Installation ("S" Models & Astro Van Models)
Wiring Diagrams