2007 GMC Yukon Owner's Manual - Page 335

g (Mute/Voice Recognition): Press and release this button to silence the vehicle speakers only. The audio of the wireless and wired headphones, if your vehicle has these features, will not be muted. Press and release this button again, to turn the sound on. If your vehicle has the navigation system, press and hold this button for longer than one second to initiate voice recognition. See "Voice Recognition" in the Navigation System manual for more information. If your vehicle has OnStar®, press and hold this button for longer than one second to interact with the OnStar system. If your vehicle is also equipped with the navigation system, press and hold this button for longer than one second to initiate voice recognition and say "OnStar" to enter OnStar® mode. See the OnStar® System on page 167 in this manual for more information. SRCE (Source): Press this button to switch between the radio (AM, FM), XM (if equipped), CD, and if your vehicle has these features, DVD, front auxiliary, and rear auxiliary. + e − e (Volume): Press the plus or minus button to increase or to decrease the radio volume. ¨ (Seek): Press the seek arrow to go to the next radio station while in AM, FM, or XM (if equipped). Press this button to go to the next track or chapter while sourced to the DVD slot. Press the button to go to the next disc while sourced to a CD or DVD changer, if multiple discs are loaded. Radio Reception You may experience frequency interference and static during normal radio reception if items such as cellphone chargers, vehicle convenience accessories, and external electronic devices are plugged into the accessory power outlet. If there is interference or static, unplug the item from the accessory power outlet. 335