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Home >> GMC >> 1988 >> Forward Control 7.4 W, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Adjustment >> Tune-Up - V6 >> Distributor
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Tune-Up - V6: Distributor

All models are equipped with Delco HEI-Electronic Spark Timing (HEI-EST) distributors.

Fig 1: 2.8L Firing Order & Timing Marks
G90G15772
Fig 2: 4.3L Firing Order & Timing Marks
G10094
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