See also:

Trailer Towing (CTS-V and Coupe)
The vehicle is neither designed nor intended to tow a trailer. ...

Erasing Speed Memory
The cruise control set speed is erased from memory by pressing the button or if the ignition is turned off. ...

Retained Accessory Power (RAP)
These accessories can be used after the engine is turned off: - Audio system (up to 10 minutes or driver door is opened). - Power windows, sunroof (if equipped), and power outlets (up to 10 minu ...