1998 GMC Suburban Owner's Manual - Page 178

TREB: Press lightly on this knob to release it from its stored position. Turn the knob to the right to increase treble and to the left to decreasetreble. When the TREB control is rotated, the AUTO TONE display will go blank. If a station is weak or noisy, you may want to decrease the treble. Push these knobs back into their stored positions when you're not using them. Adjusting the Speakers BAL: Press lightly on this knob to release it from its stored position. Turn the control to the right to adjust sound to the right speakers and to the left to adjust sound to the left speakers. The middle position balances the sound between the speakers. AUTO TONE: Press this button to select among the six preset equalization settings and tailor the sound to the music or voice being heard. Each time you press the button, the selection will switch to one of the preset settings of CLASSIC, NEWS, ROCK, POP, C/W (Country/Westernj or JAZZ. To return to the manual mode, press and release this button until the AUTO TONE display goes blank. This will return the tone adjustment to the BASS and TREB controls. If a BASS or TREB control is rotated, the AUTO TONE display will go blank. FADE: Press lightly on this knob to release it from its stored position. Turn the control to the right to adjust the sound to the front speakers and to the left for the rear speakers. The middle position balances the sound between the speakers. Push these knobs back into their stored positions when you're not using them. Playing a CassetteTape Your tape player is built to work best with tapes that are 30 to 45 minutes long on each side. Tapes longer than that are so thin they may not work well in this player. To load a cassette tape with the ignition off, press EJECT or RECALL. Then, insert the cassette tape. If the ignition is on but the radio is off, the tape will begin playing. 3-16