1996 Pontiac Bonneville Owner's Manual - Page 288

When to Check Check your tires once a month or more. Don't forget your compact spare tire. should be at It 60 psi (420 kPa). How to Check Use a good quality pocket-type gage to check tire pressure. You can't tellif your tires are properly inflated simply by looking at them. Radial tires may look properly inflated even when they're underinflated. Be sure to put the valve caps back on the valve stems. The purposeof regular rotationis to achieve more They help preventl & s by keeping outdirt and moisture. uniform wearfor all tireson the vehicle. The first rotation is the most important. See "Scheduled Tire Inspection and Rotation Maintenance Services"in the Index for scheduled rotation intervals. Tires shouldbe inspected every 6,000 to 8,000 miles (10 000 to 13 000 km) for any signs of unusual wear. When rotating your tires, always use the correct rotation If unusual -wear present, rotate your tires as soon as pattern shown here. is possible and check wheel alignment. check for Also in damaged tires or wheels. See "When It's Time for Ne,wDon't include the compact spare tire your tire rotation. Tires" and "Wheel Replacement" later this section in for more information. ~ ,. .