2003 GMC Sonoma Owner's Manual - Page 170

Finding a Station AM FM: Press this button to switch the display between time and radio station frequency. Time display is available with the ignition turned off. TUNE: Turn this knob to tune in radio stations. Setting Preset Stations The six numbered pushbuttons let you return to your favorite stations. You can set up to 18 stations (six AM, six FM1 and six FM2) by performing the following steps: 1. Turn the radio on. 2. Press AM FM to select AM, FMI or FM2. a SEEK D : Press the right or the left arrow to seek to the next or to the previous station and stay there. To scan stations, press and hold one of the SEEK arrows for two seconds until you hear a beep. The radio will go to a station, play for a few seconds and flash the station frequency, then go on to the next station. Press one of the SEEK arrows again to stop scanning. To scan preset stations, press and hold one of the SEEK arrows for more than four seconds until you hear two beeps. The radio will go to the first preset station stored on the pushbuttons, play for a few seconds and flash the station frequency, then go on to the next preset station. Press one of the SEEK arrows again to stop scanning presets. This radio will seek and scan only to stations that are in the selected band and only to those with a strong signal. 3. Tune in the desired station. 4. Press and hold one of the six numbered pushbuttons until you hear a beep. Whenever you press that numbered pushbutton, the station you set will return. 5. Repeat the steps for each pushbutton. 3-43