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Chevy Truck
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1988
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R 10 P/U 2WD L6-292 4.8L
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Repair and Diagnosis
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Powertrain Management
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Tune-up and Engine Performance Checks
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Ignition Timing
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Timing Marks and Indicators
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Locations
Timing Marks and Indicators: Locations
TIMING MARK 4.1L (250), 4.8L (292):