1997 Cadillac DeVille Owner's Manual - Page 325

When to Check Check your tires once a monthor more. Don't forget your compact spare tire.should be at It 60 psi (420 P a ) . The purpose of regular rotationis to achieve more uniform wearfor all tires on the vehicle. first The rotation is the most important. "Scheduled See Maintenance Services" in the Maintenance Schedule booklet for scheduled rotation intervals. How to Check Use a good qualitypocket-type gage to check tire pressure. You can't tellif your tires are properly inflated simplyby looking at them. Radial tires may look properly inflated even when they're underinflated. Be sure to put the valve back on the valve stems. caps They help prevent leaks keeping out dirt and by moisture. Tire Inspectionand 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 andcheck 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. When rotating your tires, always use the correct rotation pattern shown here. Don't include the compact spare tire in your tire rotation. 6-42