1996 Pontiac Firebird Owner's Manual - Page 289

Don't include the compact spare tire your in tire rotation. After the tires have been rotated, adjust the front and on rear inflation pressures as shown the Tire-Loading Information label. Make certain thatall wheel nuts are properly tightened.See "Wheel Nut Torque" in the Index. When It's T h e for New Tires One way totell when it's time for newtires is to check the treadwear indicators, which will appear when yourtires have only 1/16 inch (1.6 mm) or less of tread remaining. I Rust or dirt on a wheel, or on the parts to'which it is fastened, can make wheel nuts become loose after a time. The wheel could come and cause off an accident, When you change awheel, remove any rust or dirt from places where the wheel attach.&to the vehicle. In an emergency, you can use a cloth o r a paper towel to do this; but be sure to use a scraper or wire brush later, if you need to, to get allthe rust or dirt off. (See "Changing a Flat Tire" in the.Index.) \ You need a new tire if any of the following statements are true: around the tire... You can see the indicators at three or more places ' : . 1 ... __ . . I You can see cord or fabric showing through the tire's rubber. The tread or sidewall is cracked, cut or snagged deep enough to show cord or fabric. The tire has a.bump, bulge or split. The tire has a puncture, cut or other damage that can't be repaired well because of the size o location of the damage. r 6-48