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Home >> Pontiac >> 2004 >> GTO Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls -- 5.7L -- (Introduction) >> Description and Operation >> Powertrain Control Module (PCM) Description >> PCM Function

PCM Function

The PCM supplies a buffered voltage to various sensors and switches. The PCM controls most components with electronic switches which complete a ground circuit when the switches are turned ON.

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