Service Vehicle Soon
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
The driver information center (DIC) displays SERVICE VEHICLE SOON message when the engine control module (ECM) detects certain malfunctions that are not related to the emissions system. The instrument panel cluster (IPC) receives a serial data message from the ECM or BCM requesting the display of SERVICE VEHICLE SOON message.