Programming Replacement Passlock™ Sensor, BCM, or VCM/PCM
Important:
• The body control module (BCM) must be programmed with the proper
RPO configurations before performing learn procedures. See
Body Control Module (BCM) Programming/RPO Configuration
. • If replacing the BCM with a GM Service Parts Operations (SPO)
replacement part, the module will learn Passlock™ sensor data code immediately.
The existing VCM however, must learn the new fuel continue password
when the BCM is replaced. • If replacing a VCM 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 VCM 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 this procedure after replacing:
| • | Passlock™ Sensor |
| • | BCM |
| • | VCM |
30 Minute Re-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 indicator, after approximately 10 minutes the indicator 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 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 desired (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.
