Theft Deterrent Module Programming and Setup (Canada): Notes
WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
Because of how vehicle key information and theft deterrent passwords are stored within the theft deterrent module (TDM), the Set Up a New Theft Deterrent Module (TDM) Using Existing Keys procedure must be performed prior to the removal and replacement of the TDM if the vehicle keys are being reused. If the scan tool is unable to communicate with the TDM or is otherwise unable to extract this information from the TDM, the vehicle keys must be replaced.