Service Vehicle Soon
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
The driver information center (DIC) illuminates the SERVICE VEHICLE SOON indicator when the engine control module (ECM)/powertrain control module (PCM) detects certain malfunctions that are not related to the emissions system. The DIC receives a class 2 message requesting warning message illumination from the ECM/PCM.