Operation CHARM
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GMC Truck
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1998
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C 2500 Truck 2WD V8-454 7.4L VIN J SFI
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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/Audio System Operation
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(UM6)
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Tuning (TUNE)
Tuning (TUNE)
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Rotate the TUNE knob clockwise in order to increase the AM or FM frequency.
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Rotate the TUNE knob counterclockwise in order to decrease the AM or FM frequency.