GMC Sierra Owners Manual
Questions and Answers About Safety Belts
Q: Will I be trapped in the vehicle after a crash if I am wearing a safety belt?
A: You could be — whether you are wearing a safety belt or not.
Your chance of being conscious during and after a crash, so you can unbuckle and get out, is much greater if you are belted.
Q: If my vehicle has airbags, why should I have to wear safety belts?
A: Airbags are supplemental systems only; so they work with safety belts — not instead of them. Whether or not an airbag is provided, all occupants still have to buckle up to get the most protection.
Also, in nearly all states and in all Canadian provinces, the law requires wearing safety belts.