2005 Cadillac STS Owner's Manual - Page 243

Audio Steering Wheel Controls SRCE (Source): Press this button to switch between FM1, FM2, AM, or XM1 or XM2 (if equipped), radio, or CD. g (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® manual provided with your vehicle 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. The audio steering wheel controls may be different depending on your vehicles options. Some audio controls can be adjusted at the steering wheel. They include the following: Press this button to silence the system. Press this button again, or any other radio button, to turn the sound on. 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. > (Mute): 3-111