2004 GMC Envoy Owner's Manual - Page 214

To scan preset stations, press and hold either SCAN arrow for more than four seconds. PRESET SCAN will appear on the display and you will hear a double beep. The radio will go to a preset station stored on the pushbuttons, play for a few seconds, then go on to the next preset station. Press either SCAN arrow again to stop scanning presets. The radio will only scan stations with a strong signal that are in the selected band. Setting the Tone (Bass/Treble) AUDIO: Push the AUDIO knob until BASS or TREB appears on the display. Turn the knob to increase or to decrease. If a station is weak or noisy, decrease the treble. To adjust bass or treble to the middle position, select BASS or TREB and push and hold the AUDIO knob. The radio will produce one beep and adjust the display level to zero. To adjust all tone and speaker controls to the middle position, push and hold the AUDIO knob when no tone or speaker control is displayed. CENTERED will appear on the display and you will hear a beep. AUTO EQ (Automatic Equalization): Press this button to select customized equalization settings designed for country/western, jazz, talk, pop, rock, and classical. Selecting CUSTOM or changing bass or treble, returns the EQ to the manual bass and treble settings. The radio will save separate AUTO EQ settings for each preset and source. If the radio is equipped with the Bose audio system, the equalization settings are either CUSTOM or TALK. Setting Preset Stations Up to 30 stations (six FM1, six FM2, and six AM, six XM1 and six XM2 (if equipped), can be programed on the six numbered pushbuttons, by performing the following steps: 1. Turn the radio on. 2. Press BAND to select FM1, FM2, AM, or XM1 or XM2. 3. Tune in the desired station. 4. Press AUTO EQ to select the equalization. 5. Press and hold one of the six numbered pushbuttons until you hear a beep. Whenever that numbered pushbutton is pressed, the station that was set will return and the equalization that was selected will be stored for that pushbutton. 6. Repeat the steps for each pushbutton. 3-94