2008 Chevrolet Avalanche Owner's Manual - Page 209
2008 Chevrolet Avalanche Manual
Page 209 highlights
The passenger safety belt light, located on the instrument panel, will come on and stay on for several seconds and then flash for several more. This chime and light are repeated if the passenger remains unbuckled and the vehicle is in motion. This light will come on when you start your vehicle, and it will flash for a few seconds. The light should go out and the system is ready. 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. If the passenger's safety belt is buckled, neither the chime nor the light will come on. Airbag Readiness Light There is an airbag readiness light on the instrument panel cluster, which shows the airbag symbol. The system checks the airbag's electrical system for malfunctions. The light tells you if there is an electrical problem. The system check includes the airbag sensor, the pretensioners, the airbag modules, the wiring and the crash sensing and diagnostic module. For more information on the airbag system, see Airbag System on page 1-56. {CAUTION: If the airbag readiness light stays on after you start your vehicle, it means the airbag system may not be working properly. The airbags in your vehicle may not inflate in a crash, or they could even inflate without a crash. To help avoid injury to yourself or others, have your vehicle serviced right away if the airbag readiness light stays on after you start your vehicle. 3-33