Set Up a Theft Deterrent Module (TDM) Using New Keys

IMPORTANT: Use this procedure only if replacing the theft deterrent module (TDM) using new vehicle keys.

IMPORTANT:

When replacing a TDM with a GM SPO Replacement Part, the TDM will learn the keys immediately. However, the existing powertrain control module (PCM) must learn the fuel continue password of the replacement TDM.
When replacing a PCM with a GM SPO Replacement Part, the new PCM will learn the incoming fuel continue password of the TDM immediately upon the next ignition switch from OFF to CRANK. A PCM which had been installed in another vehicle will have learned the fuel continue password of the other vehicle TDM. Perform either the 10-Minute Relearn Procedure or the 30-Minute Relearn Procedure to learn the fuel continue password of the current vehicle TDM.
When performing either relearn procedure, all previously learned keys will be erased from the TDM memory.
Additional keys may be learned after performing either the 10-Minute Relearn Procedure or the 30-Minute Relearn Procedure.
Use only a master key when performing the first relearn procedure. If you use a valet key first, the TDM will not allow additional keys to be learned.

Connect a scan tool to the vehicle.
Turn ON the ignition, with the engine OFF.
With a scan tool, select TDM in the Vehicle Control Systems Module Replacement/Setup data list.
Select Step 1.
Select Use New Keys.
Follow the scan tool on-screen instructions.