2003 GMC Sierra 1500 Pickup Owner's Manual - Page 253

Playing the Radio PWR (Power): Push this knob to turn the system on and off. For DAB (Canada only, if your radiois equipped with DAB), pushing this knob switches the display between channel name and PTY name. To change thedefault on the display, push this knob until you see thedisplay you want, thenhold the knob until the display flashes. The selected display will now be the default. 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. Finding a Station BAND: Press this button to switch between AM, FM, FM2, or XM1, XM2 (USA only, if your radio is equipped with XMTMSatellite Radio Service) or DAB1, DAB2 (Canada only, if your radio is equipped with DAB). The display will show your selection. TUNE: Turn this knob to select radio stations. For DAB (Canada only, if your radio is equipped with DAB), the TUNE knob allows you to navigate the DAB frequency range. Turning this knob will tune up or tune down the range. The radio will display the letter L with a number next to it (1 through23). Each L number refers to a frequency and there can be multiple stations contained in one frequency. It may also take a few seconds, once you have tuned to a frequency, for that frequency to gather all of the stations. Depending on how many stations are within a frequency, with every tune up or down, you may be tuning to another station or to another frequency. The display will show your selections. RCL (Recall): Push this knob to switch the display between the radiostation frequency and the time. Pushing this knob with the ignition off will display the time. For XMTM(USA only, if your radio is equipped with XMTM Satellite Radio Service), push this knob while in XMTM mode toretrieve various pieces of information related to the current song or channel. By pushing and releasing this knob, you may retrieve four different categories of information: Artist, Song Title, Category or PTY, Channel Number/Channel Name. 3-98