Adding and Removing Categories
Categories cannot be added or removed while the vehicle is moving faster than 8 km/h (5 mph).
To add or remove a category:
1. Press the MENU button.
2. Press the softkey located below the XM CAT tab.
3. Turn the 
knob to display the category to add or remove.
4. Press the softkey located under the Add or Remove tab.
To restore all removed categories, press the softkey under the Restore All tab.
5. Repeat the steps to remove more categories.
See also:
Engine Coolant Heater
The engine heater can provide easier starting and better fuel economy during engine warm-up in cold weather conditions at or below −18°C (0°F). Vehicles with an engine heater should be plugged ...
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 ...
Satellite Radio
Vehicles with an XM™ satellite radio tuner and a valid XM satellite radio subscription
can receive XM programming. ...