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Home >> GMC >> 1994 >> Forward Control 7.4 N >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 6.5L Diesel >> Self-Diagnostic System >> Notes

Self-Diagnostic System: Notes

The 6.5L light duty emission DEC system includes a self-diagnostic system which can determine input signal circuit malfunctions. Input signal circuits determine engine function control.