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Home >> GMC >> 1996 >> Forward Control 7.4 N >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - Gasoline >> Computerized Engine Controls >> Powertrain Control Module (Pcm)/Vehicle Control Module (VCM) >> Power Supply
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Power Supply

Power for PCM/VCM reference output signals (5 volts) and control devices (12 volts) is received from the battery through ignition circuit when ignition switch is in ON position. Keep-alive memory power is received directly from the battery.