See also:

New for 2011
The Sierra Hybrid gets GM's OnStar 9.0 telematics system that GM says provides better voice recognition. GM also said they have worked to cut down on the amount of wind noise occupants hear. ...

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 ta ...

Error Messages
If Disc Error displays and/or the disc comes out, it could be for one of the following reasons: ○ The disc has an invalid or unknown format. ○ The disc is very hot. Try the disc again ...