Operation CHARM
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GMC
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1986
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G 2500 3/4 Ton Van V8-350 5.7L
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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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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Trouble Codes
Trouble Codes
Trouble codes set in ECM memory will be displayed on SCAN numerical readout.