Removal Procedure

NOTE: 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 procedure must be performed prior to the removal and replacement of the TDM if the vehicle keys are being reused. Performing the setup procedure first allows the scan tool to extract the key information and passwords from the old TDM prior to its removal. Failure to perform this step will result in the failure to learn the existing vehicle keys and new vehicle keys will be required when replacing the TDM.
Do not use the scan tool for any other programming operations while performing this procedure. Doing so will erase the stored data retrieved from the original TDM and cause the set-up to fail.

Remove the ignition switch. Refer to Ignition and Start Switch Replacement .
Remove the theft deterrent control module screws.

Fig 1: View Of Theft Deterrent Control Module

Courtesy of GENERAL MOTORS CORP.

Remove the theft deterrent control module.