1993 Oldsmobile Silhouette Owner's Manual - Page 251

Tire lnspection and Rotation ro make your tires last longer, have them [nspected and rotated the mileages at recommended in the Maintenance Schedule. See the Index under Ycheduled Maintenance Services. Use this rotation pattern. After the tires nave been rotated, adjust the front and rear inflation pressure as shown on the Zertification/Tire label. Make certain :hat all wheel nuts are properly ightened. See the Index under Wheel Vut Torque. b the 1 When lt's Time for New Tires One way to tell when it's time for new tires is to check the treadwear indicators, which will appear when your tires have only 2/32 inch (1.6 mm) or less of tread remaining. You need a new tire if: 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, 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 or location of the damage. parts to which it i astened, can make wheel 3ecome loose after a time. wheel could come off and cause an dccident. When you change a wheel, remove any rust or dirl from places where the wheel ttaches to the vehicle. In ar ergency, you can use a clot1 L paper towel to do this; but b sure to use a scraper or wire 1: later, if you need to, to get all the rust or d i e off. (See the I d e x under Changing a Flat Tire). '