See also:

Infotainment System Overview
The infotainment system is controlled by using the buttons on the faceplate and the touch screen. See “Infotainment Control Buttons” in this section for more information. ...

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. ...

Running the Vehicle While Parked
It is better not to park with the engine running. But if you ever have to, here are some things to know. WARNING Idling a vehicle in an enclosed area with poor ventilation is dangerous. Engine exhau ...