See also:

Portable Audio Devices
This vehicle may have an auxiliary input located on the radio faceplate and a USB port located in the instrument panel storage area. External devices such as iPods™, laptop computers, MP3 players, ...

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. ...

Starting the Vehicle Messages
FAST IDLE ON If your vehicle has this feature, this message displays when the fast idle feature is on. See Fast Idle System on page 9‑31 for more information. ...