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Home >> GMC >> 1998 >> Forward Control 7.4 B >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 7.4L >> Self-Diagnostic System >> ECM/Pcm/VCM Location
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ECM/Pcm/VCM Location

On most models, ECM/PCM/VCM is located behind right or left side of dash, behind right or left kick panel, or on left or right side of engine compartment. For a more precise location, see COMPONENT LOCATIONS in SYSTEM/COMPONENT TESTS - 7.4L article.