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Home >> GMC Truck >> 1993 >> G 3500 1 Ton Van V8-454 7.4L >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Engine >> Tune-up and Engine Performance Checks >> Ignition Timing >> Specifications

Ignition Timing: Specifications

Base Timing 4° BTDC (Manual Trans)

Base Timing 4° BTDC (Auto Trans)

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