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GMC Truck
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1991
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S15/T15 4WD P/U V6-173 2.8L
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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 29
DTC 29
Code 29 (Simultaneous Dropout Of All Four Sensors, Above 8 Mph).:
