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Chevy Truck
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1993
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S10/T10 P/U 2WD L4-151 2.5L
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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
Fig. 78 DTC Codes 65 Or 66 (Open Or Shorted Pump Motor Relay). 1993:
