FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM
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Car repair manuals for everyone.
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Chevy Truck
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2002
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Express 1 Ton Van V8-5.7L VIN R
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Description and Operation
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Powertrain Control Module
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Powertrain Control Module (PCM) Description
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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 turned ON.