2007 GMC Envoy Owner's Manual - Page 253

If the radio cannot find the desired program type, NONE displays and the radio returns to the last station you were listening to. BAND (AF - Alternate Frequency): Alternate frequency lets the radio switch to a stronger station with the same program type. To turn alternate frequency on, press and hold BAND for two seconds. A ON displays. The radio can switch to stations with a stronger frequency. To turn alternate frequency off, press and hold BAND again for two seconds. AF OFF displays. The radio does not switch to other stations. This function does not apply for XM™ Satellite Radio Service. ALERT! is not affected by tests of the emergency broadcast system. This feature is not supported by all RDS stations. INFO (Information): If the current station has a message, the information symbol displays. Press this button to see the message. The message can display the artist, song title, call in phone numbers, etc. If the entire message is not displayed, parts of the message appears every three seconds. To scroll through the message, press and release the INFO button. A new group of words display after every press of this button. Once the complete message has displayed, the information symbol disappears from the display until another new message is received. The last message can be displayed by pressing the INFO button. The last message can be viewed until a new message is received or you tune to a different station. When a message is not available from a station, No Info displays. RDS Messages ALERT!: Alert warns of local or national emergencies. When an alert announcement comes on the current radio station, ALERT! displays. You will hear the announcement, even if the volume is low or a CD is playing. If a CD is playing, play stops during the announcement. Alert announcements cannot be turned off. 253