REAR END COLLISION SENT 2002 GMC ENVOY INTO FREEWAY CENTER MEDIAN, VEHICLE THEN ROLLED OVER ONTO PASSENGER SIDE. FRONT/SIDE DRIVER AND PASSENGER AIR BAGS FAILED TO DEPLOY. APPROXIMATE SPEED OF VEHICLE AT IMPACT, 40-45 MPH. DRIVER SUFFERED MINOR INJURIES, PASSENGER (14-YR OLD) RENDERED UNCONSCIOUS AND SUFFERED CONCUSSION AND OTHER MINOR INJURIES.*AK