In 1973, a 50th percentile male dummy was released, and the National Highway Transportation Safety Administration (NHTSA) undertook an agreement with General Motors to produce a model exceeding Hybrid II's performance in a number of specific areas.
En 1973, fue creado el dummy masculino percentil 50,y la "National Highway Transportation Safety Administration (NHTSA)" NHTSA firmó un acuerdo con General Motors para crear un modelo que mejorara al Hybrid II.