Replace and Program Control Module or Reprogram Control Module

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

1. Install EL-49642  SPS programming support tool .
2. Access the Service Programming System (SPS) and follow the on-screen instructions.
3. On the SPS Supported Controllers screen, select ONSU Onstar® Module Setup and Service Activation and follow the on-screen instructions.
4. At the end of programming, choose the "Clear All DTCs" function on the SPS screen.
5. The default language for the new Communication Interface Module is English. To change to an alternate language, access the scan tool.
6. Inform the customer that it may take up to 24 hours for the OnStar® service to become fully activated.