1997 Pontiac Grand Prix Owner's Manual - Page 318

To calibrate the system: 1. Turn the ignition switch to ON. 2. The CALIBRATE TIRE PRESS button is under the instrument panel, to the right of the steering column. Press and hold the button for about three seconds. The CHECK TIRE PRFSS light will flash three times and go out. If the light doesn't go out after you press the CALIBRATE TIRE PRESS button, see your dealer for service. 3. The system completes the calibration process during driving. During the first 10 to 20 miles (15 to 30 km) of driving, the system will not alert you if a tire is low or high. After 20 to 80 miles (30 to 125 km), the system will only alert you about pressure differences of 12 psi (85 kPa) or more. After 80 miles (125 km) of driving, the system will alert you if a tire is 8 psi (55 P a ) different from the other three tires. The purpose of regular rotation is to achieve more uniform wear for all tires on the vehicle. The first rotation is the most important. See "Scheduled Maintenance Services" in the Index for scheduled rotation intervals. 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 as possible and check wheel alignment. Also check fordamaged tires or wheels. See "When It's Time for New Tires" and "Wheel Replacement" later in this section for more information. When rotating your tires, always use the correct rotation pattern shown here. Don't include thecompact spare tire in your tire rotation. 6-48