Hi,
There really isn't a way around it. I'm not sure what all has been tried, but here is a relearn procedure for the system. It will take 30 minutes. Try this and let me know if it helps.
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30-Minute Relearn Procedure
1. With a master PASS-Key III key, turn ON the ignition, with the engine OFF.
IMPORTANT:
- This procedure is not available on vehicles equipped with option code (Z49).
- If replacing a BCM with an GM SPO replacement part, perform the procedure to setup a new BCM prior to the 30-Minute Relearn Procedure.
2. Observe the STARTING DISABLED DUE TO THEFT message on the driver information center (DIC), after approximately 10 minutes the STARTING DISABLED DUE TO THEFT message on the DIC 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.
5. With a master PASS-Key III key, start the vehicle. The vehicle has now learned the key transponder information and the PCM has now learned the fuel continue password.
IMPORTANT: The vehicle learns the key transponder information and/or passwords on the ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
6. With a scan tool, clear any DTCs.
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Let me know if this helps.
Joe
Nov 25, 2020 at 9:33 AM
