A corner node for reinforcing a portion of a truck box of a pickup truck is provided. The corner node may be disposed within a cavity defined by a cross member and a corner box pillar of the truck box. The corner node may include a lateral portion and a pillar portion extending vertically from the lateral portion. The lateral portion may be secured within the cross member. The pillar portion may have a plurality of sidewalls secured to the pillar and may define a plurality of web supports spaced apart along a height of the pillar portion to reinforce a corner region of the truck box. The corner node may be five or six thousand series aluminum.