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Home >> GMC >> 1989 >> Forward Control 4.8 T, Standard >> Repair and Diagnosis >> Engine Performance >> Adjustment >> Tune-Up - 6-CYL >> Adjustments >> Ignition System >> Distributor

Ignition System: Distributor

All models are equipped with High Energy Ignition (HEI) systems. No adjustments are required.

Fig 1: Firing Order & Distributor Rotation

G8355

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