2003 Pontiac Aztek Owner's Manual - Page 181

You need to check the oil level right away. Have your vehicle serviced immediately. Low Tire Message Change Engine Oil Message I 7 LOW TIRE PRESSURE United States I CHANGE ENGINE OIL I I c Canada I I I I Canada States United If this message comes on and stays on after you started the engine, have the oil changed. For additional information on when to change the oil and resetting the system, see Engine Oil on page 5-13. Your vehicle may have a LOW TIRE PRESSURE message. If it does, the check tire pressure system can alert you to a large change in the pressure of one tire. After the system has been properly calibrated, the LOW TIRE PRESSURE message will come on and a chime will sound if a pressure difference (low pressure) is detected in one tire. The message will stay on until you turn off the ignition or reset (calibrate) the system. See Check Tire Pressure System on page 5-57. If the anti-lock brake system warning light comes on, the check tire pressure system may not be working properly. See your dealer for service. Also, see Anti-Lock Brake System Warning Light onpage 3-35. 3-44