Programming Replacement Passlock™ Sensor, BCM, or PCM
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 Computer/Integrating Systems. • If replacing the BCM with a GM Service Parts Operations (SPO) replacement
part, the module will learn passlock™ sensor data code immediately.
The existing powertrain control module (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 vehicles fuel
continue password and will require a learn procedure after programming
to learn the current vehicles password.
Conditions
Use this procedure after replacing any of the following:
| • | Passlock™ Sensor |
| • | BCM |
| • | 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.
