2005 Pontiac Grand Prix Owner's Manual - Page 356

The tire inflation monitor system will not alert you if the pressure in more than one tire is low, if the system is not properly calibrated, or if the vehicle is moving faster than 70 mph (110 km/h). When the CHECK TIRE PRESSURE warning message comes on, stop as soon as possible and check all the tires for damage. If a tire is flat, see If a Tire Goes Flat on page 5-73. Also, check the tire pressure in all four tires as soon as possible. See Inflation - Tire Pressure on page 5-64. The CHECK TIRE PRESSURE warning message will also be displayed, while the ignition is on, until the system is reset. To reset the system, see "Tire Inflation Monitor System" under the options mode in DIC Controls and Displays (Base Level DIC) on page 3-49 or DIC Controls and Displays (Uplevel DIC with Trip Computer) on page 3-57. Do not reset the tire inflation monitor system without first correcting the cause of the problem and checking and adjusting the pressure in all four tires. If the system is reset when the tire pressures are incorrect, the system will not work properly and may not respond when a tire is low. The tire inflation monitor system will need to be reset any time a tire's pressure is adjusted, the tires are rotated, or one or more tires is repaired or replaced. The system will also need to be reset when new tires are purchased for the vehicle and when the battery has been disconnected. Tire Inspection and Rotation Tires should be rotated every 5,000 to 8,000 miles (8 000 to 13 000 km). Any time you notice unusual wear, rotate your tires as soon as possible and check wheel alignment. Also check for damaged tires or wheels. See When It Is Time for New Tires on page 5-68 and Wheel Replacement on page 5-71 for more information. 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 on page 6-4 for scheduled rotation intervals. 5-66