The Service Fuel Cell System (FCS) Soon indicator provides the status of the propulsion system. It is sometimes referred to as the Malfunction Indicator Lamp (MIL). If the light comes on and stays on, contact OnStar or your Driver Relationship Manager (DRM).

This light comes on, as a check to show it is working, when the key is turned to SYSTEM ON but the vehicle is not running.

If the light does not come on as a bulb check, contact OnStar or your Driver Relationship Manager (DRM).