Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2001EXPRESS 1/2 TON VAN V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDESCRIPTION AND OPERATIONSERVICE PROGRAMMING SYSTEM (SPS)AFTER PROGRAMMING A CONTROL MODULE
2001 Chevrolet Express 1/2 Ton Van V6-4.3L VIN W
After Programming A Control Module
2001 Chevrolet Express 1/2 Ton Van V6-4.3L VIN WSECTION After Programming A Control Module
The powertrain may operate slightly different after a control module software/calibration update. Operating the powertrain through various driving conditions allows the control module to re-learn certain values. The control module must re-learn the following after a software/calibration update:
^ Fuel trim correction
^ Idle air control learned position
^ Automatic transmission shift adapts
Other learned values only re-learn by doing a service procedure.
If a control module is replaced the following service procedures must be performed:
^ The crankshaft variation learn procedure, if applicable.
^ The Engine Oil Life Reset Procedure, if applicable
^ The Idle Learn Procedure, if applicable
^ The Inspection/Maintenance Complete System Set Procedure
^ The Vehicle Theft Deterrent Password Learn Procedure, if applicable
^ The TP Sensor Learn Procedure, if applicable
^ Fuel trim correction
^ Idle air control learned position
^ Automatic transmission shift adapts
Other learned values only re-learn by doing a service procedure.
If a control module is replaced the following service procedures must be performed:
^ The crankshaft variation learn procedure, if applicable.
^ The Engine Oil Life Reset Procedure, if applicable
^ The Idle Learn Procedure, if applicable
^ The Inspection/Maintenance Complete System Set Procedure
^ The Vehicle Theft Deterrent Password Learn Procedure, if applicable
^ The TP Sensor Learn Procedure, if applicable
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.