2006 Buick Lucerne Owner's Manual - Page 209

Setting the Tone (Bass/Treble) BASS/MID/TREB (Bass, Midrange, or Treble): To adjust bass, midrange, or treble, press the tune knob until the tone control labels appear on the display. Continue pressing to highlight the desired label, or press the pushbutton positioned under the desired label. Turn the tune knob clockwise or counterclockwise to adjust the highlighted setting. You can also adjust the highlighted setting by pressing either the SEEK, FWD or REV button until the desired levels are obtained. If a station's frequency is weak, or if there is static, decrease the treble. To quickly adjust bass, midrange, or treble to the middle position, press the pushbutton positioned under the BASS, MID, or TREB label for more than two seconds. You will hear a beep and the level will be adjusted to the middle position. To quickly adjust all tone and speaker controls to the middle position, press the tune knob for more than two seconds until you hear a beep. EQ (Equalization): Press this button to select preset equalization settings. To return to the manual mode, press the EQ button until Manual appears on the display or start to manually adjust the bass, midrange, or treble by pressing the tune knob. Adjusting the Speakers (Balance/Fade) BAL/FADE (Balance/Fade): To adjust balance or fade, press the tune knob until the speaker control labels appear on the display. Continue pressing to highlight the desired label, or press the pushbutton positioned under the desired label. Turn the tune knob clockwise or counterclockwise to adjust the highlighted setting. You can also adjust the highlighted setting by pressing either the SEEK, FWD, or REV button until the desired levels are obtained. To quickly adjust balance or fade to the middle position, press the pushbutton positioned under the BAL or FADE label for more than two seconds. You will hear a beep and the level will be adjusted to the middle position. To quickly adjust all speaker and tone controls to the middle position, press the tune knob for more than two seconds until you hear a beep. 3-85