2005 Chevrolet Uplander Owner's Manual - Page 184

Passenger Safety Belt Reminder Light Several seconds after the key is turned to RUN or START, a chime will be provided for several seconds to remind the front passenger to buckle their safety belt. This would only occur if a passenger is detected by the passenger sensing system. See Passenger Sensing System on page 1-82 for more information. The passenger safety belt light will also be provided and stay on for several seconds, then it will flash for several more. You should have the passenger buckle their safety belt. This chime and light will be repeated if the passenger remains unbuckled and the vehicle is in motion. Airbag Readiness Light There is an airbag readiness light on the instrument panel, which shows the airbag symbol. The system checks the airbag's electrical system for malfunctions. The light comes on if there is an electrical problem. The system check includes the airbag sensor, the airbag modules, the wiring and the diagnostic module. For more information on the airbag system, see Airbag System on page 1-74. 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. If the passenger's safety belt is buckled, neither the chime nor the light will be provided. If the airbag readiness light stays on after you start the vehicle or comes on when you are driving, your airbag system may not work properly. Have your vehicle serviced right away. 3-34