Some audio controls can be adjusted at the steering wheel. They include the following:

(Mute): Press this button to silence the system. Press this button again, or any other radio button, to turn the sound on.

SRCE (Source): Press this button to switch between FM1, FM2, AM, or XM1 or XM2 (if equipped), radio, or CD.

(OnStar®/Voice Recognition): If your vehicle has the Radio with CD or Radio with Six-Disc CD audio system, press this button to interact with the OnStar system. See the OnStar section in this manual for more information. If your vehicle has the navigation system, press this button to initiate voice recognition. See "Voice Recognition" in the Navigation System manual for more information. You may be able to interact with the OnStar system using this button. See the OnStar manual provided with your vehicle for more information.

1-6 (Preset Stations): Press this button to play stations that are programmed on the radio preset pushbuttons. The radio will only seek preset stations with a strong signal that are in the selected band. When a CD is playing, press this button to go to the next track. When a CD is playing in the six-disc CD changer, press this button to go to the next available CD, if multiple CDs are loaded.

+ -- (Volume):  Press this button to increase or to decrease the volume.

+ -- (Seek): Press either arrow to go to the next or the previous radio station and stay there. The radio will only seek stations with a strong signal that are in the selected band. When a CD is playing, press the minus sign to go to the start of the current track, if more than 10 seconds have played. Press the plus sign to go to the next track. If either the minus or the plus button are pressed more than once, the player will continue moving backward or forward through the CD. Press and hold the SEEK plus or minus button, until you hear a beep. The CD will fast forward or fast reverse through the CD. Press either button again to play the passage.

If you have the navigation system, some of the audio steering wheel controls work when a DVD is playing in the navigation radio. See the Navigation System manual for more information.