1998 GMC Suburban Owner's Manual - Page 190

Care of Your Cassette Tape Player A tape player that is not cleaned regularly can cause reduced sound quality, ruined cassettes or a damaged mechanism. Cassette tapes should be stored in their cases away from contaminants, direct sunlight and extreme heat. If they aren't, they may not operate properly or m y cause failure of the tape player. Your tape player should be cleaned regularly after every 50 hours of use. Your radio may display CLN t o indicate that you have used your tape player for 50 hours without resetting the tape clean timer. If this message appears o n the display, your 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 your tapes and player. If you notice a reduction i n sound quality, try a known good cassette to see if it is the tape or the tape player at fault. If this other cassette has no improvement in sound quality, clean the tape player. Cleaning may be done with a scrubbing action, non-abrasive cleaning cassette with pads which scrub the tape head a s the hubs of the cleaner cassette turn. A scrubbing action cleaning cassette is available through your dealership. When using a cleaning cassette, it is normal for the cassette t o eject while cleaning because your unit is equipped with a cut tape detection feature and some cleaning cassettes may appear as a broken tape. If the cleaning cassette is e-jected immediately from the tape player. you will need to override the cut tape feature. To temporarily override this feature (for one insertion), follow these steps: 0 Turnthe ignition on. Press and hold TAPE AUX until the tape symbol flashes on the display. (For vehicles without Automatic Tone Control, press both SEEK arrows.) Insert the cleaning cassette. (Insert the cassette at least three times to ensure thorough cleaning.) 0 Eject the cleaning cassette. 3-28