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.
2002 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE
With Scan Tool
NOTE:
This procedure requires a Tech 2 scan tool and a techline terminal with current Service Programming System (SPS) software.
- Connect Tech 2 scan tool to vehicle. Select REQUEST INFORMATION under SERVICE PROGRAMMING menu. Disconnect Tech 2 from vehicle and connect to techline terminal.
- On techline terminal, select THEFT MODULE RE-LEARN under SERVICE PROGRAMMING menu. Disconnect Tech 2 from techline terminal and connect to vehicle. Turn ignition switch to RUN position.
- Select VTD RE-LEARN under SERVICE PROGRAMMING menu. Attempt to start engine, then release key to RUN position (vehicle should not start).
- Observe SECURITY indicator. After approximately 10 minutes indicator will turn OFF. Vehicle is now ready to relearn Passlock(tm) sensor data code and/or password on next ignition switch transition from OFF to CRANK position.
- Turn ignition switch to OFF position, and wait 5 seconds. Start engine. Vehicle has now learned password. Using scan tool, clear any DTCs.
Factory Service Tools
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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.
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