2007 Chevrolet Avalanche Owner's Manual - Page 296

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 (forward), or REV (reverse) 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 choose bass and treble equalization settings designed for different types of music. The choices are pop, rock, country, talk, jazz, and classical. Selecting MANUAL or changing bass or treble, returns the EQ to the manual bass and treble settings. Unique EQ settings can be saved for each source. If your radio has a Bose® audio system, the EQ settings are either MANUAL or TALK. 296