GMC 2003 Envoy - Manual (Page 208)

Setting the Tone (Bass/Treble) Adjusting the Speakers (Balance/Fade)
AUDIO: Push the AUDIO knob unlil BASS, MIO or
TREB appears on the display. Turn the Kniib lo inqreasa
or to decrease. If a station as weak or noisyf you may
warrt
10 decrease the treble.
To adjusi bass, midrange or treble to the middle
position, select BASS, MID or TREB and push and hold
the AUDIO knob. The radio will produce one beep
and adjusl the display level io zero,
To adjusl all lone and speakEr controls to the middle
pnsitiQii, push and hold ihe AUDIO knob when no tone
OF speaker cnnlrol is displayed. The radio will produce
one beep and CENTERED will appear on the display
AUTO EO (.Aulomatjc Equalization): Press this buttorr
to choose between bass, midrange and ireblo
equalizalion settings designed for country, lazz, lalk,
pop, rock and classical program types.
To rglum to the manual mode (CUSTOM), press the
AUTO EO button unlil CUSTOM appears on the display.
Then you will be able to manually adjust Iha bass,
midrange and treble using the AUDIO knob.
AUDIO; To adjust the balança belween Ihe righi
and the left speakers, push Ihe AUDIO knob until EAL
appears on ihe display. Turn the knob lo move Ihe
sound loward lha left or the nght speakers.
To adjusi the (abE between Ihe fron1 and rear speakem,
push and hold ihe AUDIO knob until FAD appears on
1he display. Turn the knob to move the sound toward the
from or Ihe rear speakers
To adjusi the balance and the fade to the middle
position, soled balance or fade and push end hold Ihe
AUDIO knob. The radio will beep once and wiil
adjust the display level to the middle position
To adjusi all tone and speaker controls to the middle
position, push and bold the AUDIO knob when no tone
or speaker controls are displayed. The radio will
produce one beep and CENTERED will Bppear on the
display.
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