Important: Due to component variability, the vehicle theft deterrent (VTD) system must have the learn procedure performed regardless, if the vehicle starts on the first ignition cycle after a VTD repair.
All codes in the theft deterrent module must be cleared for a relearn.Important:
• The body control module (BCM) must be programmed with the proper RPO
configurations before performing learn procedures. Refer to
Body Control Module (BCM) Programming/RPO Configuration
in Programming
and Setup. • If replacing the BCM with a GM Service Parts Operations (SPO) replacement
part, the module will learn Passlock™ sensor data code immediately. The existing
PCM however, must learn the new fuel continue password when the BCM is replaced. • If replacing a PCM with a GM Service Parts Operations (SPO) replacement
part, after programming, these modules will learn the incoming fuel continue password
immediately upon receipt of a password message. Once a password message is received,
and a password is learned, a learn procedure must be performed to change this password
again. A PCM which has been previously installed in another vehicle will have learned
the other vehicle's fuel continue password and will require a learn procedure after
programming to learn the current vehicle's password.
Conditions
Use these procedures after replacing:
| • | The Passlock™ Sensor |
| • | The BCM |
| • | The PCM |
10 Minute Learn Procedure
- Turn ON the ignition, with the engine OFF.
- Attempt to start the engine, then release the key to ON (vehicle will not start).
- Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
- Turn OFF the ignition, and wait 5 seconds.
- The vehicle is now ready to relearn the Passlock™ Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK.
- Start the engine. The vehicle has now learned the Passlock™ Sensor Data Code and/or password.
- With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles.
Important: The vehicle learns the Passlock™ Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
