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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 MANUALSCHEVROLET2000EXPRESS 3/4 TON VAN V8-5.7L VIN RREPAIR AND DIAGNOSISACCESSORIES AND OPTIONAL EQUIPMENTANTITHEFT AND ALARM SYSTEMSSERVICE AND REPAIRPASSLOCK REPROGRAMMING SEED AND KEY
2000 Chevrolet Express 3/4 Ton Van V8-5.7L VIN R
PASSLOCK Reprogramming Seed and Key
2000 Chevrolet Express 3/4 Ton Van V8-5.7L VIN RSECTION PASSLOCK Reprogramming Seed and Key
DISCLAIMER
This step by step procedure is intended to augment the Passlock(TM) Diagnostic Repair Procedures. Sole reliance on this procedure may lead to unintended results.
TOOLS REQUIRED
^ CD-ROM database containing the passlock seed and key algorithm loaded on a computer with class 2 capability
^ Scan Tool TECH 2 or a compatible scan tool
CONDITIONS
IMPORTANT: If a new Vehicle/Powertrain Control Module (VCM/PCM) is being installed for the first time the manufacturing enable bit will be set and the auto learn procedure may not be necessary. The following procedure allows the relearning of the Passlock(TM) module or the VCM/PCM learned data code after the replacement of any of the following parts:
^ The Passlock(TM) Module
^ The Passlock(TM) Sensor
^ The VCM/PCM
The Passlock(TM) module will set the DTC B3031 module in the learn mode when entering the reprogramming procedure.
REPROGRAMMING PROCEDURE
IMPORTANT: The Seed and Key reprogramming procedure accomplishes the same task in 10 minutes as the Auto Learn procedure does in 30 minutes. Use either one of these two procedures.
The following is the Seed and Key Learn Procedure:
1. Insure the ignition key is in the ON position.
2. Clear all Passlock(TM) Module and VCM/PCM DTCs, note and refer all VCM/PCM DTCs to:
^ For 4.3L engines, refer to A Powertrain On Board Diagnostic (OBD) System Check in Computers and Controls - 4.3L
^ For 5.0/5.7L engines, refer to A Powertrain On Board Diagnostic (OBD) System Check in Computers and Controls - 5.015.7L
^ For 6.5L engines. Refer to A Powertrain On Board Diagnostic (OBD) System Check in Computers and Controls - 6.5L
^ For 7.4L engines, refer to A Powertrain On Board Diagnostic (OBD) System Check in Computers and Controls - 7.4L
3. With scan tool (TECH 2) connected to the vehicle, select "Programming/Request Info" from menu, then follow instructions.
4. Disconnect scan tool from vehicle and perform "Service Programming System/VTD Learn" with Techline terminal, then follow instructions.
5. Reconnect scan tool to the vehicle.
6. Follow instructions on the scan tool to perform the VTD password learn on the vehicle, this takes about 10 minutes.
7. After 10 minutes, the SECURITY indicator will turn OFF. The new security code is ready to be communicated among the Passlock sensor, Passlock module and VCM/PCM. The new Password is learned on the next ignition lock cylinder cycle from OFF-to-CRANK-to-ON (start attempt).
This step by step procedure is intended to augment the Passlock(TM) Diagnostic Repair Procedures. Sole reliance on this procedure may lead to unintended results.
TOOLS REQUIRED
^ CD-ROM database containing the passlock seed and key algorithm loaded on a computer with class 2 capability
^ Scan Tool TECH 2 or a compatible scan tool
CONDITIONS
IMPORTANT: If a new Vehicle/Powertrain Control Module (VCM/PCM) is being installed for the first time the manufacturing enable bit will be set and the auto learn procedure may not be necessary. The following procedure allows the relearning of the Passlock(TM) module or the VCM/PCM learned data code after the replacement of any of the following parts:
^ The Passlock(TM) Module
^ The Passlock(TM) Sensor
^ The VCM/PCM
The Passlock(TM) module will set the DTC B3031 module in the learn mode when entering the reprogramming procedure.
REPROGRAMMING PROCEDURE
IMPORTANT: The Seed and Key reprogramming procedure accomplishes the same task in 10 minutes as the Auto Learn procedure does in 30 minutes. Use either one of these two procedures.
The following is the Seed and Key Learn Procedure:
1. Insure the ignition key is in the ON position.
2. Clear all Passlock(TM) Module and VCM/PCM DTCs, note and refer all VCM/PCM DTCs to:
^ For 4.3L engines, refer to A Powertrain On Board Diagnostic (OBD) System Check in Computers and Controls - 4.3L
^ For 5.0/5.7L engines, refer to A Powertrain On Board Diagnostic (OBD) System Check in Computers and Controls - 5.015.7L
^ For 6.5L engines. Refer to A Powertrain On Board Diagnostic (OBD) System Check in Computers and Controls - 6.5L
^ For 7.4L engines, refer to A Powertrain On Board Diagnostic (OBD) System Check in Computers and Controls - 7.4L
3. With scan tool (TECH 2) connected to the vehicle, select "Programming/Request Info" from menu, then follow instructions.
4. Disconnect scan tool from vehicle and perform "Service Programming System/VTD Learn" with Techline terminal, then follow instructions.
5. Reconnect scan tool to the vehicle.
6. Follow instructions on the scan tool to perform the VTD password learn on the vehicle, this takes about 10 minutes.
7. After 10 minutes, the SECURITY indicator will turn OFF. The new security code is ready to be communicated among the Passlock sensor, Passlock module and VCM/PCM. The new Password is learned on the next ignition lock cylinder cycle from OFF-to-CRANK-to-ON (start attempt).
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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.