Operation CHARM
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GMC Truck
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1983
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G 3500 1 Ton Van L6-250 4.1L VIN D 2-bbl
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Repair and Diagnosis
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Sensors and Switches
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Sensors and Switches - Powertrain Management
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Sensors and Switches - Computers and Control Systems
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Knock Sensor
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Locations
Knock Sensor: Locations
Fig. 46 Typical Electronic Spark System (ESC):
Fig. 47 Typical ESC Controller: