Operation CHARM
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GMC Truck
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1994
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Yukon V8-393 6.5L DSL Turbo
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Repair and Diagnosis
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Heating and Air Conditioning
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Control Assembly
Control Assembly
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Testing and Inspection
With A/C
Control Head Display Blank Or Door Motors Inop
Display Does Not Dim Properly
Incorrect Air Delivery Or Mode Indicators Flashing
None of the Door Motors Operate Correctly
Temperature Door Motor Inop Or TEMP Cursors Flash
Without A/C
Locations
A/C Controller
Heater Control
Service and Repair
Diagrams
C23O Heater-A/C Controller to I/P
C23O I/P to Heater-A/C Controller
C230A A/C Controller
C250A Heater Control Lamp
Technical Service Bulletins
