2004 Chevrolet Astro Owner's Manual - Page 146

Safety Belt Reminder Light When the key is turned to RUN or START, a tone will come on for several seconds to remind people to fasten their safety belts, unless the driver's safety belt is already buckled. The safety belt light will also come on and stay on for several seconds, then it will flash for several more. Air Bag Readiness Light There is an air bag readiness light on the instrument panel, which shows AIR BAG or the air bag symbol. The system checks the air bag's electrical system for malfunctions. The light tells you if there is an electrical problem. The system check includes the air bag sensor, the air bag modules, the wiring and the crash sensing and diagnostic module. For more information on the air bag system, see Air Bag System on page 1-58. If the driver's belt is already buckled, neither the tone nor the light will come on. United States Canada This light will come on when you start your vehicle, and it will flash for a few seconds. Then the light should go out. This means the system is ready. 3-26