See also:

Cleaning the RSE Seatback Console
Use only a clean cloth dampened with clean water to clean the RSE seatback console surface. ...

Customer Assistance for Text Telephone (TTY) Users (U.S. and Canada)
To assist customers who are deaf, hard of hearing, or speech impaired and who use Text Telephones (TTYs), GMC has TTY equipment available at its Customer Assistance Center. Any TTY user can communicat ...

Ending a Call
Press to end a call. ...