2003 Chevrolet Impala Owner's Manual - Page 166

Change Engine Oil Message Low Tire Message CHANGE ENGINE OIL United States Canada This message is displayed when the engine oil needs to be changed. It will appear for 60 seconds. After 60 seconds, it will go out. Once the engine oil has been changed, the CHANGE ENGINE OIL message must be reset. Until it is reset, this message will be displayed for 60 seconds each time you start the engine. For more information on resetting the system, see "How to Reset the Change Engine Oil Message" under Engine Oil on page 5-15. LOW TIRE PRESSURE United States Canada Your vehicle may be equipped with the tire pressure system which monitors the inflation pressure of the tires. After the system has "learned" the tire pressure with properly inflated tires, the LOW TIRE PRESSURE message will be displayed and four warning chimes will sound if the tire pressure in one tire becomes 12 psi (83 kPa) lower than the other three tires. When you have checked the tire pressures, be sure to reset the tire inflation monitor. See "Tire Pressure Monitor System" under Tires on page 5-60. 3-43