Vehicle Interface Unit (VIU)
- Record the STID number from the label on the new module (10 Digits).
- Install the new VIU.
- After replacement, press and hold the OnStar "End Call" button (black with white dot); watch for the OnStar® status light to change from Green to Red to Green.
- Move the vehicle outside and let it run for ten minutes.
- Press the blue OnStar® button twice to connect to OnStar®. Tell the advisor that this vehicle has a new VIU and a new STID number to put in the customers account and that the vehicle requires a "Reconfiguration".
- The OnStar® Advisor will reconfigure the vehicle with you. Once the advisor completes configuration, you can end the call. Follow any additional instructions given by the Advisor.
- The old VIU must be returned for core credit with the address label included in the original box. Failure to return core will result in a debit.