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 BCM Programming/RPO
Configuration in Body Control System. |
• | If replacing the BCM with a GM Service Parts Operations (SPO) replacement
part, the module will learn Passlockâ„¢ 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:
10 Minute Learn Procedure
Tools Required
• | Techline terminal with current Service Programming System (SPS)
software |
- Connect the Tech 2 to the vehicle.
- Select "Request Information" under "Service
Programming".
- Disconnect the Tech 2 from the vehicle and connect it to
a Techline terminal.
- On the Techline terminal, select "Theft Module Re-Learn"
under "Service Programming".
- Disconnect the Tech 2 from the Techline terminal and connect
it to the vehicle.
- Turn ON the ignition, with the engine OFF.
- Select "VTD Re-Learn" under "Service Programming".
- Attempt to start the engine, then release the key to ON. The vehicle
will not start.
- Observe the SECURITY telltale, after approximately 10 minutes
the telltale will turn OFF. The vehicle is now ready to relearn the Passlockâ„¢
Sensor Data Code and/or password on the next ignition switch transition
from OFF to CRANK.
- Turn OFF the ignition, and wait 5 seconds.
- Start the engine. The vehicle has now learned the password.
- With the Tech 2 scan tool, clear any DTCs.
30 Minute Learn Procedure
Tools Required
None
- Turn ON the ignition, with the engine OFF.
- Attempt to start the engine, then release the key to ON. The 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.
- Repeat steps 1 through 4 two more times for a total of 3 cycles/30
minutes. The vehicle is now ready to relearn the Passlockâ„¢ Sensor
Data Code and/or passwords on the next ignition switch transition
from OFF to CRANK.
Important: The vehicle learns the Passlockâ„¢ 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.
- Start the engine. The vehicle has now learned the Passlockâ„¢ Sensor
Data Code and/or password.
- With a scan tool, clear any DTCs if needed. History DTCs will
self clear after 100 ignition cycles.