Programming Replacement Passlock™ Sensor, BCM, or PCM
Important:
• | 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 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 password. |
Conditions
Use this procedure after replacing:
Learn Procedures
There are 2 available methods to perform the programming procedure:
• | A 10-minute procedure which requires a Tech 2 and a techline terminal. |
• | A 30-minute procedure which does not require the use of any tools. |
10-Minute Learn Procedure
Tools Required
• | Techline terminal with current Service Programming System (SPS) software |
- Connect the Tech 2 to the vehicle.
- Select Request VTD Info. for SPS under Special Functions in Body Control
Module.
- 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 Program ECU under Service Programming System.
- 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. 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.
- 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
- 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.
- 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.
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.
- 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.