I WAS INVOLVED IN AN ACCIDENT AND WAS HIT TWICE FROM BEHIND. THE CHEMICAL FROM THE SIDE AIRBAG WAS RELEASED BUT THE AIRBAG DID NOT DEPLOY. THE CHEMICAL WAS A FINE MIST OR LIGHT SMOKE. THE SEAT BELT LOCKED THE FIRST TIME I WAS HIT. I AM NOT SURE WHEN THE AIRBAG MIST OCCURRED (? WITH THE FIRST OR SECOND HIT) THEY HAPPENED WITHIN SECONDS OF EACH OTHER. A "SERVICE AIRBAG" WARNING LIGHT IS NOW ILLUMINATED. THE VEHICLE IS GOING IN FOR REPAIRS AS A RESULT OF THE CRASH AND THIS WILL BE ADDRESSED. I JUST WANTED TO REPORT THIS. I HAVE ALSO NOTIFIED CHEVROLET DIRECTLY.