2003 Buick Regal Owner's Manual - Page 264
2003 Buick Regal Manual
Page 264 highlights
Notice; Don't let anyonetell you that underinflation or overinflation is all right. It's not. If your tires don't have enough air (underinflation), you get the can following: Too much flexing 0 How to Check Use a good quality pocket-type gage to check tire pressure. You can't tell if 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. They help prevent leaks by keeping out dirt and moisture. Too much heat Tire overloading Badwear Badhandling Bad fuel economy Tire Pressure Monitor System If your vehicle has the tire inflation monitor system, it can alert you to a large change in the pressure of one tire. The system "learns" the pressure at each tire throughout the operating speed range of your vehicle. The system normally takes between 45 and 90 minutes of driving to learn the tire pressures. This time may be longer depending on your individual driving habits. Learning need not be accumulated during a single trip. Once learned, the system will remember the tire pressures until the system is recalibrated. After the system has learned tire pressures with properly inflated tires, the LOW TIRE light will come onif the pressure in one tire becomes 12 psi (83kPa) lower than the other three tires. The tire inflation monitor system won't 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 (1 10 kmh). 5-59 If your tires have too much air (overinflation), you can get the following: 0 Unusual wear Bad handling 0 Rough ride Needless damage from road hazards 0 When to Check Check your tires once a month or more. Don't forget your compact spare tire. It should be at 60 psi (420 kPa).