2002 Chevrolet TrailBlazer Owner's Manual - Page 218
2002 Chevrolet TrailBlazer Manual
Page 218 highlights
Setting the Tone (Bass/Treble) AUDIO: To set the bass, press the AUDIO control until BASS appears on the display. Turn the control to increase or decrease bass. When you use this control, the radio's tone setting will switch to custom. To set the bass to the middle position, select BASS and press and hold the AUDIO control. The radio will produce one beep and set the display level to zero. To set all tone and speaker controls to the middle position, press and hold the AUDIO control when no tone or speaker control is active. The radio will produce one beep and CENTERED will appear on the display. To set the midrange, press the AUDIO control until MID appears on the display. Turn the control to increase or decrease midrange. When you use this control, the radio's tone setting will switch to custom. To set the midrange to the middle position, select MID and press and hold the AUDIO control. The radio will produce one beep and set the display level to zero. To set all tone and speaker controls to the middle position, press and hold the AUDIO control when no tone or speaker control is active. The radio will produce one beep and CENTERED will appear on the display. To set the treble, press the AUDIO control until TREB appears on the display. Turn the control to increase or decrease treble. When you use this control, the radio's tone setting will switch to custom. If a station is weak or noisy, you may want to decrease the treble. To set treble to the middle position, select TREB and press and hold the AUDIO control. The radio will produce one beep and set the display level to zero. To set all tone and speaker controls to the middle position, press and hold the AUDIO control when no tone or speaker control is active. The radio will produce one beep and CENTERED will appear on the display. AUTO EQ: This feature allows you to choose preset bass, midrange and treble equalization settings designed for country, jazz, talk, pop, rock and classical stations. The setting last chosen will appear on the display when you first press AUTO EQ. Each time you press this button, another setting will appear on the display and AUTO EQ will switch to one of the preset settings previously listed. To return to the manual mode (CUSTOM), press the AUTO EQ button until CUSTOM appears on the display. Then you will be able to manually adjust the bass, midrange and treble using the AUDIO button. To find out how to do this, see Setting the Tone following. 3-46