1993 Cadillac Seville Owner's Manual - Page 324

A CAUTION: Rust or dirt on a wheel, or on the parts to whichit is fastened, can make wheel nuts become loose after a time. The wheel could come off and cause an accident. When you change wheel, a attaches to remove anyrust ordirt from places where the wheel the vehicle. In an emergency, you can usea cloth or a paper towel to do this; butbe sure to use ascraper or wire brush later, if you need to, to get the rust or dirt off. (See "Changinga all Flat Tire" in the Index.) When It3 Timefor New Tires One way to tell when it's time for tires is new to check the treadwear indicators, which will appear when yourtires have only 2/32 inch (1.6 mm) or lessof tread remaining. You need anew tire if 0 You can see the indicators at three places around the tire. You can see cord or fabric showing through the tire's rubber. The tread or sidewall is cracked, cutor snagged deep enough to show cord or fabric. The tire has a bump, bulge split. or The tire has a puncture, cut,or other damage that can't be repaired well because of the size or location of the damage. 310