See also:

XM Categories
XM stations are organized in categories. To customize which XM categories are used and displayed in the system, see “Adding or Removing XM Categories” following. ...

Airbag System Messages
SERVICE AIRBAG This message displays if there is a problem with the airbag system. Take the vehicle to your dealer for service. ...

Customer Assistance Offices (U.S. and Canada)
GMC encourages customers to call the toll-free number for assistance. However, if a customer wishes to write or e-mail GMC, the letter should be addressed to: United States GMC Customer Assistance ...