I was a front seat passenger in a 2016 Chevrolet Silverado 1500 and was properly wearing my seatbelt at the time of the incident. The vehicle struck a deer, and during the collision, the passenger seatbelt failed to properly restrain me. I was thrown forward and struck the windshield. The seatbelt did not appear to lock or tighten as expected during impact. It is unknown whether the seatbelt pretensioner or airbag system activated properly. This created a serious safety risk, as the seatbelt did not perform its intended function of restraining the occupant during a crash. The vehicle was declared a total loss following the incident and is no longer available for inspection. The incident was documented through insurance and/or police reports. There were no known warning lights or prior indications of a problem with the seatbelt system before the crash. This failure resulted in occupant injury risk due to lack of proper restraint during the collision.