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.

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    Potential Issues
    Some OnStar services are disabled after five days. OnStar cannot perform Remote Door Unlock or Stolen Vehicle Assistance after the vehicle has been off continuously for five days. After five days, OnS ...

    Using the Radio to Control a USB Storage Device or iPod
    The radio can control a USB storage device or an iPod using the radio buttons and knobs, and display song information on the radio’s display. (Tune): Turn to select files. SEEK: Press to go to t ...

    CD-R or CD-RW Supported File and Folder Structure
    The DVD Player supports: • Up to 255 folders. • Up to eight folders in depth. • Up to 15 playlists. • Up to 40 sessions. • Playlists with an .m3u or .wpl extension. • Files with an . ...