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.
30-Minute Immobilizer Relearn
2009 Chevrolet Uplander LT, 3.9 MSECTION 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).
- With a master vehicle key, turn ON the ignition, with the engine OFF.
- Observe the security indicator. After approximately 10 minutes, the telltale will turn OFF.
- Turn OFF the ignition, and wait 5 seconds.
- Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes.
- With a master vehicle key, start the vehicle. The vehicle has now learned the ECM/PCM has now learned the fuel enable password.
- If additional keys are required to be learned, refer to Adding Keys (Canada) .
- With a scan tool, clear any DTCs.
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.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.