Operation CHARM
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Buick
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1998
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Regal V6-3.8L VIN K
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Repair and Diagnosis
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Accessories and Optional Equipment
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Radio, Stereo, and Compact Disc
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Description and Operation
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Radio Controls
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TREB Control
TREB Control
Push the TREB knob to release it. Rotate the knob to the right to increase treble. Rotate the knob to the left to decrease treble. Push the knob back in to store it when not adjusting.