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Home >> GMC >> 1991 >> Forward Control 3.9 L, SM465/M20 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Chart A-4, Injector Circuit Diagnosis >> 2.5L >> Circuit Description

Circuit Description

This chart should only be used if diagnosis in CHART A-3 indicated an injector circuit problem.

NOTE: Numbers below refer to circled numbers on diagnostic chart.

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