Operation CHARM
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GMC Truck
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1989
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R 3500 P/U 2WD V8-350 5.7L
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Repair and Diagnosis
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Powertrain Management
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Ignition System
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Sensors and Switches - Ignition System
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Knock Sensor
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Locations
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Electronic Spark Control Module
Electronic Spark Control Module
ESC Module.:
RH Top Of Engine
Applicable to: R, V & P Series