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GMC
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1992
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K 2500 Truck 4WD V6-262 4.3L VIN Z
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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 66
DTC 66
4WAL Codes 65 And 66 (Open Or Shorted Motor Relay).:
