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Home >> GMC Truck >> 1991 >> R 3500 P/U 2WD V8-454 7.4L >> Repair and Diagnosis >> Specifications >> Electrical Specifications >> Ignition Timing

Ignition Timing


Engine 7.4L (454 cid) VIN N Base Timing 4~ BTDC (Manual Trans).

Engine 7.4L (454 cid) VIN N Base Timing 4~ BTDC (Auto Trans).
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