See also:

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

TTY Users
OnStar has the ability to communicate to the deaf, hard–of–hearing, or speech–impaired customers while in the vehicle. The available dealer–installed TTY system can provide in-vehicle acces ...

Transferring a Call
Audio can be transferred between the in-vehicle Bluetooth system and the cell phone. The cell phone must be paired and connected with the Bluetooth system before a call can be transferred. ...