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GMC Truck
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1991
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C 2500 Truck 2WD V6-262 4.3L
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Repair and Diagnosis
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A L L Diagnostic Trouble Codes ( DTC )
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Testing and Inspection
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Manufacturer Code Charts
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DTC 02
DTC 02
Diagnostic Trouble Code 2, Open Isolation Valve Or Malfunctioning ECU:
