2003 Buick Regal Owner's Manual - Page 265

The tire inflation monitor system detects differences in tire rotation speeds that are caused by changes in tire pressure. The system can alert you about a low tire - but it doesn't replace normal tire maintenance. See Tires on page 5-58. When the LOW TIRE light comes on, you should stop as soon as you can and check all your tires for damage. (If a tire is flat, see If a Tire Goes Flat on page 5-67.) Also check the tire pressure in all four tires as soon as you can. See lnflation -- Tire Pressure on page 5-58. The LOW TIRE light will also be displayed (while the ignition is on) until you reset (calibrate) the system. Don't 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 you reset the system when the tire pressures are incorrect, the system will not work properly and may not alert you when a tire is low. Any time you adjust a tire's pressure, rotate your tires, or have one or moretires repaired or replaced, you'll need to reset (calibrate) the tire inflation monitor system. You'll also need to reset the system whenever you buy new tires and whenever the vehicle's battery has been disconnected. To reset (calibrate) the system: 1. Turn the ignition to RUN. 2. Locate the red RESET button inside of your instrument panel fuse block. The fuse block is located under the cover labeled FUSES, which is at the end of the instrument panel on the passenger's side of the vehicle. The RESET button is the first button in the top row of the fuse block. 3. Press and hold the RESET button for about five seconds. The LOW TIRE light will come on and flash three times. Then it will go off. If the light doesn't go off, see your dealer for service. The system completes the calibration process during driving. The system normally takes 15 to 20 minutes of driving in each of three speed ranges to "learn" tire pressures. The speed ranges are 15 to 40 mph (25 to 65 km/h), 40 to 65 mph (65 to 105 km/h) and above 65 mph (I05 km/h). When learning is complete, the system will alert you after two to eight minutes if a tire is 12 psi (83 kPa) different from the other three tires. Detection thresholds may be higher and detection times may be longer on rough roads, curves and at high speeds. The system is not capable of detection at speeds greater than 70 mph (110 km/h). 5-60