Transmission Over Temperature Detection/Alert Feature

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

The ECM continuously monitors the transmission fluid temperature. In the event that the transmission fluid temperature has exceeded a predefined threshold, the ECM will alert the driver via the Driver Information Center (DIC).
In the event that the ECM detects this scenario is present, the DIC message will read: TRANSMISSION HOT - SLOW DOWN.