Replace and Program Control Module or Reprogram Control Module

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

To program a replacement or an existing control module, perform the following procedure:

NOTE:

Begin with the vehicle in the vehicle OFF power mode. The Service Programming System will power mode the vehicle.

Ignition/Vehicle OFF
Access the Service Programming System (SPS) and follow the on-screen instructions.
In the SPS Supported Controllers screen, select K73 Telematics Communication Interface Control Module Programming and Service Activation and follow the on-screen instructions.
Clear DTCs.
Press the OnStar® Blue Button to call OnStar® to inform the advisor the module has been replaced and the system needs to be activated.