1998 Pontiac Grand Prix Owner's Manual - Page 321

When to Check Check your tires once month or more. a Don't forget your compact spare It should be at tire. 60 psi (420 P a ) . The purposeof regular rotation is to achieve more uniform wearfor a l l tires onthe vehicle. The first rotation is the most important. See "Scheduled Maintenance Services"in the Indexfor scheduled rotation intervals. How to Check Use a good quality pocket-type gage check tire to pressure. You can't tell your tires are properly inflated if simply by lookingat them. Radial tires may look properly inflated even when they're underinflated. Be sure to put the valve caps back on the valve stems. They help prevent leaks keeping outdirt by and moisture. I I Tire Inspection and Rotation Tires should be rotated every 6,000 to 8,000 miles (10 000 to 13 000 km). Any time you notice unusual wear, rotate your tires as soon possible and check as wheel alignment.Also check for damaged tires or wheels. See "When It's Time New Tires" and for "Wheel Replacement"later in this section for more information. I When rotating your tires, always the correct rotation use pattern shown here. Don't include the compact spare tire in your tire rotation. 6-46