Geometric Dimensioning and Tolerancing is used to describe the allowed element variations regarding the product design. The product development engineering need to define the symbols to use on the Feature Control Frame of every component. Since the component function has an increment on its complexity year over year, it is not trivial to define these symbols anymore. Poor specifications can increase the production cost, require late product changes or lead to legal issues. In this scenario, we developed a method to classify component features and analyze the knowledge of automotive experts using fuzzy logic. Also, the method suggests the best set of symbols based on the feature geometry, assembly and function analysis.