See also:

SUSPENSION MODE SPORT (CTS-V ONLY)
This message will be displayed when sport mode is selected using the Magnetic Ride Control button in the center of the instrument panel. See Magnetic Ride Control for more information. ...

Starting the Engine
Place the transmission in the proper gear. If the vehicle has the keyless access system, the keyless access transmitter must be authenticated in order for the ignition control knob to turn. ...

Leaving the Vehicle With the Engine Running (Automatic Transmission)
WARNING! It can be dangerous to leave the vehicle with the engine running. The vehicle could move suddenly if the shift lever is not fully in P (Park) with the parking brake firmly set. And, ...