+ e − e (Volume): Press the plus or minus volumebutton to increase or to decrease the volume.g (Mute/Speech Recognition): Press and releasethis button to silence the vehicle speakers only.The audio of the wireless and wired headphones, if yourvehicle has these features, does not mute. Press andrelease this button again, to turn the sound on.If your vehicle has the navigation system, press andhold this button for longer than one second to initiatespeech recognition. See “Speech Recognition” inthe Navigation System manual for more information.If your vehicle has OnStar®, press and hold this buttonfor longer than one second to interact with the OnStar®system. If your vehicle also has the navigation system,press and hold this button for longer than one secondto initiate speech recognition and say “OnStar” to enterOnStar® mode. See the OnStar® System on page 2-53in this manual for more information.Radio ReceptionFrequency interference and static can occur duringnormal radio reception if items such as cell phonechargers, vehicle convenience accessories, and externalelectronic devices are plugged into the accessory poweroutlet. If there is interference or static, unplug the itemfrom the accessory power outlet.AMThe range for most AM stations is greater than for FM,especially at night. The longer range can cause stationfrequencies to interfere with each other. For better radioreception, most AM radio stations boost the power levelsduring the day, and then reduce these levels during thenight. Static can also occur when things like storms andpower lines interfere with radio reception. When thishappens, try reducing the treble on your radio.FM StereoFM stereo gives the best sound, but FM signals reachonly about 10 to 40 miles (16 to 65 km). Tall buildings orhills can interfere with FM signals, causing the soundto fade in and out.XM™ Satellite Radio ServiceXM™ Satellite Radio Service gives digital radioreception from coast-to-coast in the 48 contiguousUnited States, and in Canada. Just as with FM,tall buildings or hills can interfere with satellite radiosignals, causing the sound to fade in and out. Inaddition, traveling or standing under heavy foliage,bridges, garages, or tunnels may cause loss ofXM signal for a period of time. The radio maydisplay No XM Signal to indicate interference.3-107
