2004 Buick Rendezvous Owner's Manual - Page 387

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). Check Tire Pressure System Your vehicle may have a check tire pressure system that can alert you to a large change in the pressure of one tire. The system won't alert you before you drive that a tire is low or flat. You must begin driving before the system will work properly. The LOW TIRE PRESSURE HOLD SET TO RESET message will appear on the Driver Information Center (DIC) and the LOW TIRE PRESSURE message will come on the message center if pressure difference, or low pressure, is detected in one tire. In the following conditions, the LOW TIRE PRESSURE message may not come on even if the tire pressure is low, or it may come on when the tire pressure is actually normal: • More than one tire is low • Only one tire is replaced with a new tire during service • The vehicle is moving faster than 70 mph (113 km/h) 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. Check the tire's inflation pressure when the tires are cold. Cold means your vehicle has been sitting for at least three hours or driven no more than 1 mile (1.6 km). Remove the valve cap from the tire valve stem. Press the tire gage firmly onto the valve to get a pressure measurement. If the cold tire inflation pressure matches the recommended pressure on the Tire and Loading Information label, no further adjustment is necessary. If the inflation pressure is low, add air until you reach the recommended amount. If you overfill the tire, release air by pushing on the metal stem in the center of the tire valve. Recheck the tire pressure with the tire gage. Be sure to put the valve caps back on the valve stems. They help prevent leaks by keeping out dirt and moisture. The The The Tire system is not yet calibrated tire treadwear is uneven compact spare tire is installed chains are being used The vehicle is being driven on a rough or frozen road 5-65