Operation CHARM
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GMC Truck
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1991
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R 3500 P/U 2WD V8-454 7.4L
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Repair and Diagnosis
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Engine, Cooling and Exhaust
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Cooling System
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Engine - Coolant Temperature Sensor/Switch
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Radiator Cooling Fan Temperature Sensor / Switch
Radiator Cooling Fan Temperature Sensor / Switch
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Locations
Auxiliary Cooling Fan Temperature Switch
Coolant Temperature Sender
Coolant Temperature Sensor
Coolant Temperature Switch
