This application discloses a cargo vehicle body which is vertically expansible, having a fixed lower part or portion carried on a chassis and a vertically shiftable upper part or portion in spaced guided telescopic relationship with the lower portion, with elevating and guide means disposed in the space between the telescopic sides and, when desired, resilient or spring means to assist in supporting the upper portion at least in certain positions and latch means for assisting in holding the upper body portion in raised positions and releasable for lowering it. A plurality of lift, guide, spring, and latch means are provided on each side in an effective arrangement to promote smooth even balanced operation. A door is provided which is effective to close its opening in all adjusted positions of the body.