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Home >> GMC Truck >> 1989 >> R 2500 P/U 2WD L6-292 4.8L >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Engine >> Tune-up and Engine Performance Checks >> Ignition Timing >> Specifications

Ignition Timing: Specifications

Engine 4.8L (292 cid) Base Timing 8~ TDC (Manual Trans).

Engine 4.8L (292 cid) Base Timing 8~ TDC (Auto Trans).

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