GMC 2002 Envoy - Manual (Page 198)

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Setting the Tone (Bass/Treble)
P - TYPE LIST AUDIO: To adjust the bass, press and
release the P - TYPE LIST AUDIO control until BASS
appears on the display. Then turn the control clockwise
to increase bass and counterclockwise to decrease bass.
The display will show the bass level.
To set the bass to the middle position, press and hold the
P
- TYPE LIST AUDIO control. The radio will produce
one beep and set the display level to the middle position.
To set all tone and speaker controls to the middle
position, press and hold the P
- TYPE LIST AUDIO
control when no tone or speaker control is active. The
radio will produce one beep and display ALL with the
level display in the middle position.
To adjust the treble, press and release the P - TYPE
LIST AUDIO control until TREB appears on the
display. Turn the control clockwise to increase treble
and counterclockwise to decrease treble. The display
will show the treble level. If a station is weak or noisy,
you may want to decrease the treble.
To set treble to the middle position, press and hold
P
- TYPE LIST AUDIO control. The radio will produce
one beep and set the display level to the middle position.
To set all tone and speaker controls to the middle
position, press and hold the P
- TYPE LIST AUDIO
control when no tone or speaker control is active. The
radio will produce one beep and display ALL with the
level display in the middle position.
When you use this control, the radio’s AUTO TONE
setting will return to manual.
AUTO TONE: This feature allows you to choose preset
bass and treble equalization settings designed for rock,
news, pop, jazz, classical and country stations.
Each time you press the AUTO TONE button, this
feature will change to one of the preset equalization
settings previously listed.
To return the bass and treble to the manual mode, press
and release the P
- TYPE LIST AUDIO control. See
“Setting Preset Stations” listed previously to program
the auto tone feature.
If your vehicle has the Bose radio, your audio system
allows you to choose from four different equalization
settings: talk, driver, normal and spatial. These settings
can be used while listening to the radio, the cassette tape
or CD player.