The contact owns a 2008 Chevrolet Tahoe. While the contact's daughter was entering traffic at 65 MPH, the vehicle in front made an abrupt stop. As a result, the contact's daughter was unable to stop the vehicle in time and crashed into the rear of the vehicle. The contact was concerned that no air bags deployed during the impact. In addition, the contact stated that the OnStar feature failed to activate and it was concluded that it was due to the sensors. During the impact, the contact's daughter's head hit the steering wheel and caused an injury in which physical therapy was required on the weekly basis. The vehicle was towed and a police report was filed. The contact also wanted to advise that vehicle was included in NHTSA Campaign Number 21V52000 (Air Bags). The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 139,000.