1993 Buick LeSabre Owner's Manual - Page 129

Rear Window Defogger (Option) The lines you see on the rear window warm the glass. Press thebutton to start warming your 1 window. After-10 minutes it will go off by itself, or pressing thebutton again during the heating cycle will shut it off. If you need additional warming time, push the button again. Audio Systems Your Delco@ audio system has been designed to operate easily and give years of listening pleasure. But you will get the most enjoyment outyour system if you acquaint yourself with it first. Find out what your Delco system can do and how to operate all its controls, tobe sure you're gettingthe most out of the advanced engineering that went into it. @ FM Stereo FM stereo will give you the best sound. But FM signals will reach only about 10 to 40 miles (16 to65 km). And, tall buildings or hills can interfere with FM signals, causing the sound to come go. and AM Scraping the inside your rear window could of cut and damage the heater. Your warranty would not cover this damage. Don't put decals there off. you might have to scrape them The range for most AM stations is greater than for FM, especially at night. The longer range, however, can cause stations to interfere with each other. AM can pick up noise from things like storms and power lines. Try reducing the treble to reduce this noise.