Acceleration data is often collected on vehicle cabs for heavy-duty trucks with accelerometers placed at various locations throughout the cab. The center of mass of the cab is of particular interest as is represents a convenient location for computational models. Additionally, the number of acceleration channels collected may exceed the required six degrees of freedom needed to fully define the equations of motion for the cab center of mass. This presentation details a method utilizing the Moore-Penrose pseudo inverse to find a best fit for the cab center of mass to an over constrained set of acceleration channels. This method may also be extended to find accelerations at other locations on the cab, so long as the rigid body assumption is not violated.