In this paper, the computer-aided vehicle dynamics analysis of a 6 x 2 heavy-duty commercial vehicle is examined. For the analysis, Mechanical Simulation Corporation's TruckSim multibody dynamics simulation and SuspensionSim multibody statics simulation softwares are used. The aim of this study is to design and model the front suspension and tandem rear axle suspensions, compose the full-vehicle model representing the real-life vehicle, and examine the dynamic behavior of this model. The models related to the front and rear suspensions are prepared and solved in SuspensionSim and the solutions are imported thereafter to TruckSim. The full-vehicle model excluding the suspension system is formed by using TruckSim. The simulation scenarios, runs of which are made to observe the effects of different parameters concerning the dynamic behavior of the full-vehicle model, are also prepared in TruckSim environment.