Circuit Description
WARNING: This page is about a different car, the 2015 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
The OnStar® error indicator is internal to the inside rearview mirror. The Red error indicator is illuminated when a system malfunction is present. If no error indicator is seen on the mirror the system is ON and operating normally. In the event there is a system malfunction and the OnStar® system is still able to make a call, the indicator will flash red during the call. The OnStar® error indicator is controlled internally by the inside rearview mirror via serial data from the telematics communication interface control module.