An apparatus includes a plurality of first inputs, corresponding to changeable vehicle state variables, manipuable to simulate changes in vehicle state. The apparatus includes a plurality of second inputs, corresponding to vehicle system controls, manipuable to simulate activation of vehicle controls. Also, in this embodiment, the apparatus also includes one or more bus inputs, configured to receive vehicle CAN bus signals and one or more bus outputs, configured to output vehicle CAN bus signals. Further, the apparatus includes a communication connection, configured to connect to a vehicle computing system module (VCSM) and to provide and receive signals from the VCSM allowing for testing of hardware and software in conjunction with the VCSM under various vehicle environments.