Abstract: An illustrative embodiment of the present disclosure provides a cargo vehicle that includes a body with operator cabin and enclosed cargo area sections. The cargo area is located behind the operator cabin and includes at least one swing door hingedly attached to the body of the cargo area. The door is configured to swing open and closed via a hinge attached to both the swing door and to the body. When the swing door is open a longitudinal gap is formed between the body and the swing door. A longitudinally extending closeout panel is located over at least a portion of that longitudinal gap and coupled to both the swing door and body inside the cargo vehicle. The closeout panel is configured to fold to the interior of the cargo vehicle when the swing door is closed and expand when the swing door is opened.