2003 Buick Rendezvous Owner's Manual - Page 240

Playing the Radio PWR (Power): Push this knob to turn the system on and off. VOL (Volume): Turn the knob to increase or to decrease volume. AUTO VOL (Automatic Volume): Your system has a feature called automatic volume. With this feature, your audio system adjusts automatically to make up for road and wind noise as you drive. Set the volume at the desired level. Press this button to select MIN, MED or MAX. Each higher setting will allow for more volume compensation at faster vehicle speeds. Then, as you drive, automatic volume increases the volume, as necessary, to overcome noise at any speed. The volume level should always sound the same to you as you drive. If you don't want to use automatic volume, select OFF. RCL (Recall): Push this knob to switch the display between the radio station frequency and the time. Pushing this knob with the ignition off will display the time. For XMTM (USA only,your radio is equipped with XMTM if Satellite Radio Service), pressing this button while in XMTM mode to retrieve various pieces of information related to the current song or channel. By pressing and releasing the RCL button, you may retrieve four different categories of information: Artist, SongTitle, Category or PTY, Channel Number/Channel Name. For DAB (Canada only, if your radio isequipped with DAB), pushing this knob switches the display between channel name and PTY name. To change the default on the display, push the knob until you see the display you want, then hold the knob until the display flashes. Theselected display will now bethe default. 3-89