Replace and Program Control Module or Reprogram Control Module
To program a replacement or an existing control module, perform the following procedure:
- Install EL-49642 SPS programming support tool .
- Access the Service Programming System (SPS) and follow the on-screen instructions.
- Due to a recent temporary change in SPS you must select 'Reprogram ECU', for OnStar Module Programming from the Selected Programming Process even if the unit is being replaced.
- If 'Replace and Program ECU' is selected the OnStar Module will not be listed in the Supported Controllers screen. You must go back and select 'Reprogram ECU'.
- On the SPS Supported Controllers screen, select ONSU Onstar® Module Setup and Service Activation and follow the on-screen instructions.
- At the end of programming, choose the "Clear All DTCs" function on the SPS screen.
- The default language for the new Communication Interface Module is English. To change to an alternate language, access the scan tool.
- Inform the customer that it may take up to 24 hours for the OnStar® service to become fully activated.
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