LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 2002 >> Century Custom >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.1L Engine >> Programming >> Theft Deterrent Password Learn Procedure >> 10-Minute Learn Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

10-Minute Learn Procedure

NOTE: This procedure requires a Tech 2 scan tool and a Techline terminal with current SPS (Service Programming System) software.
  1. Connect the Tech 2 to the vehicle.
  2. Select Request Information under Service Programming.
  3. Disconnect the Tech 2 from the vehicle and connect it to a Techline terminal.
  4. On the Techline terminal, select Theft Module Re-Learn under Service Programming.
  5. Disconnect the Tech 2 from the Techline terminal and connect it to the vehicle.
  6. Turn ignition on, with engine off.
  7. Select VTD Re-Learn under Service Programming.
  8. Attempt to start engine, then release key to ON position (vehicle will not start).
  9. Observe the SECURITY telltale, after approximately 10 minutes, the telltale will turn off (vehicle is now ready to relearn the Passlock™ Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK).
  10. Turn ignition off, and wait 5 seconds.
  11. Start engine (vehicle has now learned the password).
  12. With the Tech 2 (scan tool), clear any DTCs.
scientia non olet · About LEMON Manuals