Chevrolet TrailBlazer 2003 Manual page 190

Setting the Tone (Bass/Treble)
AUDIO: Push and release the AUDIO knob until BASS
or TREB appears on the display. Turn the knob to
increase or to decrease. The display will show the bass
or treble level. If a station is weak or noisy, you may
want to decrease the treble.
To adjust the bass and treble to the middle position,
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 control is displayed. The radio will produce
one beep and display ALL with the level display in
the middle position.
AUTO TONE (Automatic Tone): Press this button to
choose bass and treble equalization settings designed
for country/western, jazz, talk, pop, rock and classical
stations.
To return the bass and treble to the manual mode,
press and release the AUDIO knob.
If your vehicle has the Bose
TONE button to enhance the audio performance
for different passengers in the vehicle.
3-72
®
radio, press the AUTO
The setting last chosen will appear on the display when
you first press AUTO TONE. Each time you press
this button, another setting will appear on the display
and AUTO TONE will switch to one of the preset settings
listed.
Your audio system allows you to choose from four
different equalization settings: normal, driver, rear and
spacious. These settings can be used while listening to
the radio or the CD player.
NORMAL: Provides the best overall vehicle sound
quality for all seating locations.
DRIVER: This setting gives the driver the best sound
quality.
REAR: This setting gives the rear seat passengers the
best sound quality.
SPACIOUS: This setting makes the listening space
seem larger.
The radio will save separate AUTO TONE settings for
each preset and source.