The article describes a marketing study of commercial vehicle consumers' preferences, performed with a view to improve the products of the GAZ Group. In the beginning of the article there's a description of the Russian automobile market status as of the end of 2017, stating the basic development trends. The study reviewed in the article has been performed by the questionnaire survey method and the survey participants were the GAZ automobile brand owners. The study outcome revealed the most popular GAZ brand vehicles, the average service life of this brand's autos, the frequency of these vehicles' owners resorting to the car service and the level of satisfaction with the GAZ Group product quality has been assessed, as well as the quality of the feedback between the manufacturer and the consumers. Assessed was also the consumers' willingness to purchase vehicles of this manufacturer, the sales promotion measures, exercising the major effect on potential consumers. Among the recognized characteristics which serve as a basis for consumer orientation while purchasing commercial vehicles were the technical characteristics, the price, the operating conditions and the operating economy. Among the basic "problem components" of the GAZ brand commercial vehicles, the respondents identified the internalcombustion engine, the car body (paint and lacquer coating), the material quality, etc. The study results, presented in the article, have a practical value and could be used for the GAZ brand commercial vehicle promotion and improvement program development.