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Home >> Chevrolet >> 2003 >> TrailBlazer 5.3 P, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Self-Diagnostics - 5.3L >> Programming >> Theft Deterrent Password Learn Procedure >> 10-Minute Learn Procedure

10-Minute Learn Procedure

NOTE: This procedure requires a Tech 2® scan tool and a Techline® terminal with current Service Programming System (SPS) 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 ON the ignition, with the engine OFF.
  7. Select "PROGRAM ECU" under "SERVICE PROGRAMMING".
  8. Attempt to start the engine, then release the key to ON (vehicle will not start).
  9. Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF (the 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 OFF the ignition, and wait 5 seconds.
  11. Start the engine (the vehicle has now learned the password).
  12. With the Tech 2®, clear any DTCs.
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