Abstract: An anti-ingress system for the doors, the side windows and the rear window of motor vehicles, in particular pick-up trucks, has a mounting frame is secured to the pick-up truck adjacent the rear of the cab, a rear anti-ingress panel is connected with the mounting frame so as to cover the rear window of the cab, and, on each opposite side of the mounting frame, a side window anti-ingress panel is movably mounted to the mounting frame so as to permit each side window anti-ingress panel to be located in one of two positions: a first position clear of the door and its side window, and a second position interferingly located adjacent the door and the side window, thereby preventing unauthorized entry through the side window as well as preventing unauthorized opening of the door. There are several embodiments of preferred structures that provide selective, locable movement of the two side window anti-ingress panels.