Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Immobilizer System Component Programming (North America except Canada)
2008 Pontiac Grand Prix V6-3.8LSECTION Immobilizer System Component Programming (North America except Canada)
Immobilizer System Component Programming (North America except Canada)
10-Minute Immobilizer Relearn
This 10-minute relearn procedure will relearn the fuel enable password between the body control module (BCM) and the engine control module/powertrain control module (ECM/PCM).
1. Connect a scan tool between the vehicle and the Techline Terminal for the pass-thru programming method.
2. Turn ON the ignition, with the engine OFF.
3. Ensure that all power consuming devices are turned OFF on the vehicle.
4. On the Techline Terminal, select pass-thru programming, build the vehicle, and follow the on-screen instructions.
5. Ensure the correct programming selection is chosen based on component being replaced or programmed. For this procedure, go to the V.T.D. Vehicle Theft Deterrent Learn menu and choose the Vehicle Theft Deterrent Learn for Powertrain System selection.
6. At this point the scan tool must remain connected for the duration of the 10-minute relearn procedure.
Important:
* The scan tool will initially display 12 Minutes. The first 2 minutes allow the scan tool to initialize the appropriate control module. The remaining 10 minutes is the relearn timer.
* On some vehicles the security indicator may be illuminated for the duration of the 10-minute relearn procedure.
7. Observe the scan tool. After approximately 10 minutes the scan tool will display "Programming Successful, Turn OFF Ignition". The vehicle is now ready to relearn the password on the next ignition switch transition from OFF to CRANK.
8. Turn OFF the ignition and wait 2 minutes.
9. With a master vehicle key, turn the ignition to the RUN position for 15 seconds, then start the vehicle. The ECM/PCM has now relearned the fuel enable password.
10. With a scan tool, clear any DTCs.
30-Minute Immobilizer Relearn
This 30-minute relearn procedure will relearn the fuel enable password between the body control module (BCM) and the engine control module/powertrain control module (ECM/PCM).
1. With a master vehicle key, turn ON the ignition, with the engine OFF.
2. Observe the security indicator. After approximately 10 minutes, the telltale will turn OFF.
3. Turn OFF the ignition, and wait 5 seconds.
4. Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes.
Important: The vehicle learns the fuel enable passwords on the ignition switch transition from OFF to RUN. You must turn the ignition OFF before attempting to start the vehicle.
5. With a master vehicle key, start the vehicle. The vehicle has now learned the ECM/PCM has now learned the fuel enable password.
6. If additional keys are required to be learned, refer to Adding Keys (North America except Canada) (Adding Keys (North America except Canada))Adding Keys (Canada) (Adding Keys (Canada)) .
7. With a scan tool, clear any DTCs.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.