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Home >> GMC >> 1999 >> Forward Control 7.4 B >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Tests W/Codes - Diesel >> Self-Diagnostic System >> Pcm Location
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Pcm Location

On "C" and "K" Series, PCM is located behind right side of instrument panel, above blower motor. On "G" Series, PCM is located behind center of instrument panel. On "P" Series, PCM is located behind left side of instrument panel.