Diesel Data
: Automotive Repair
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Chevy Truck
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1988
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C 3500 Truck 2WD V8-379 6.2L DSL
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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 21
DTC 21
Fig. 48 Code 21 diagnosis. 1988:
