Operation CHARM
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GMC Truck
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1987
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G 3500 1 Ton Van V8-350 5.7L VIN M 4-bbl
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Repair and Diagnosis
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Powertrain Management
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Testing and Inspection
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Scan Tool Testing and Procedures
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Positions
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EGR Position
EGR Position
Indicates position of
EGR valve
pintle as voltage reading. Normal reading is .3-2 volts.