1998 GMC Suburban Owner's Manual - Page 176

CLN: If this message appears on the display, the cassette tape player needs to be cleaned. It will still play tapes, but you should clean it as soon as possible to prevent damage to the tapes and player. See "Care of Your Cassette Tape Player" i n the Index. After you clean the player, press and hold EJECT for five seconds to reset the CLN indicator. The radio will display --- to show the indicator was reset... Playing the Radio PWR-VOL: Press this knob to turn the system on and off. To increase volume, turn the knob to the right. Turn it to the left to decrease volume. The knob is capable of being rotated continuously. AM-FM Stereo with CassetteTape and Automatic Tone Control (If Equipped) RECALL: Display the time with the ignition off by pressing this button. When the radio is playing, press this button to recall the station frequency. SCV Your system has a feature called Speed-Compensated-Volume (SCV). With SCV, your audio system adjusts automatically to make up for road and wind noise as you drive. Set the volume at the desired level. Move the control ring behind the upper knob to the right to adjust the SCV. Then, as you drive, SCV autonmtically increases the volume, as necessary, to overcome noise at any particular speed. The volume level should always sound the same to you as you drive If you don't want to use SCV, turn the control all the way down. Each notch on the control ring allows for more volume compensation at faster vehicle speeds. 3-14