2004 GMC Yukon Owner's Manual - Page 269

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. Adjusting the Speakers (Balance/Fade) AUDIO: To adjust the balance between the right and the left speakers, push the AUDIO knob until BAL appears on the display. Turn the knob to move the sound toward the right or the left speakers. To adjust the fade between the front and rear speakers, push and hold the AUDIO knob until FAD appears on the display. Turn the knob to move the sound toward the front or the rear speakers. To adjust the balance and the fade to the middle position, select balance or fade and push and hold the AUDIO knob. The radio will produce one beep and adjust the display level to the middle position. To adjust all tone and speaker controls to the middle position, push and hold the AUDIO knob when no tone or speaker controls are displayed. CENTERED will appear on the display and you will hear a beep. 3-111