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GMC Truck
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2007
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Sierra Classic 2500 2WD V8-8.1L
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Repair and Diagnosis
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Engine, Cooling and Exhaust
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Engine
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Timing Components
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Timing Component Alignment Marks
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Locations
Timing Component Alignment Marks: Locations
Timing Component Alignment Marks:
Ensure the crankshaft sprocket is aligned to the 12 o'clock position and the camshaft sprocket is aligned to the 6 o'clock position.