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Home >> Chevrolet >> 1999 >> Express 1/2 Ton Van V8-5.7L VIN R >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Description and Operation >> Control Module Learning Ability
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Control Module Learning Ability

The control module has a learning ability which allows the control module to make corrections for minor variations in the fuel system in order to improve driveability. Whenever the battery cable is disconnected, the learning process resets.

The driver may note a change in vehicle performance. In order to allow the VCM to re-learn, drive the vehicle at pan throttle with moderate acceleration.