2009 GMC Envoy Owner's Manual - Page 243

PROG (Program): Press to play a station that has been programmed on the radio preset pushbuttons. The radio seeks preset stations only with a strong signal that are in the selected band. When a CD is playing in the CD changer, press this button to go to the next available CD, if multiple CDs are loaded. Radio Reception Frequency interference and static can occur during normal radio reception if items such as cell phone 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. Q SOURCE R: Press the SOURCE arrows to switch between FM1, FM2, AM, or XM1 or XM2, or a CD. If a CD is loaded the CD symbol displays. Q SEEK R: Press the SEEK arrows to go to the previous or the next radio station and stay there. The radio seeks stations only with a strong signal that are in the selected band. When a CD is playing, press the SEEK arrows to fast forward or reverse. AM The range for most AM stations is greater than for FM, especially at night. The longer range can cause station frequencies to interfere with each other. For better radio reception, most AM radio stations boost the power levels during the day, and then reduce these levels during the night. Static can also occur when things like storms and power lines interfere with radio reception. When this happens, try reducing the treble on the radio. Q VOLR (Volume): Press the VOL arrows to increase or to decrease the volume. FM Stereo FM signals only reach about 10 to 40 miles (16 to 65 km). Although the radio has a built-in electronic circuit that automatically works to reduce interference, some static can occur, especially around tall buildings or hills, causing the sound to fade in and out. 3-111