2002 GMC Envoy Owner's Manual - Page 191

The middle position balances the sound between the speakers. To set the fade to the middle position, press the P-TYPE LIST AUDIO control briefly, then press it again and hold it until the radio emits one beep. The fade will be set to the middle position and the display will show the speaker balance. To set all tone and speaker controls to the middle position, press and hold the P-TYPE LIST AUDIO control when no tone or speaker control is active. The radio will produce one beep and display ALL with the level display in the middle position. Using RDS Your audio system is equipped with a Radio Data System (RDS). RDS is a system that sends data along with the audio of the FM station you are currently tuned to. You can use RDS to display program information and to control your radio. With RDS your radio can do the following: RDS features are only available on FM stations which broadcast RDS information. The RDS features of your radio rely on receiving specific RDS information from these stations. These features will only work when the RDS information is available. In rare cases, a radio station may broadcast incorrect information that will cause the radio features to work improperly. If this happens, please contact the radio station. When you are tuned to an RDS station, the station name will appear on the display, instead of the frequency. Most RDS stations provide their station name, the time of day and a Program Type (PTY) for their current programming. Some stations also provide the name of the current program. TUNE DISP: Press this control to change what appears on the display while using RDS. Pressing this control will also display an RDS station frequency or program type when the radio is on. The display options are station name, station frequency, PTY and the name of the program (if available). Pressing and holding this control will activate the RDS default display. D Seek only to stations with the types of programs you want to listen to, D seek to stations with traffic announcements, D receive announcements concerning local and national emergencies, and D receive and display messages from radio stations. 3-17