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.
See also:
Battery
The battery supplies power to start the engine and operate any additional electrical accessories.
• To avoid break-down or failure to start the vehicle, maintain a battery with full cranking power. ...
Vehicle Security
This vehicle has theft-deterrent features; however, they do not make it impossible to steal. ...
USB Supported File and Folder Structure
The radio supports:
• Up to 700 folders.
• Up to eight folders in depth.
• Up to 65,535 files.
• Folder and file names up to 64 bytes.
• Files with an .mp3 or .wma file extension.
• ...





