See also:

Trans (Transmission) Temp (Temperature) (CTS-V Only)
This display shows the transmission fluid temperature in either degrees Celsius (°C) or degrees Fahrenheit (°F). ...

Temperature – A, B, C
The temperature grades are A (the highest), B, and C, representing the tire's resistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions ...

Underbody Maintenance
Use plain water to flush dirt and debris from the vehicle's underbody. Your dealer or an underbody car washing system can do this. If not removed, rust and corrosion can develop. ...