Abstract: An insert arranged for complementarily mounting within a pickup truck bed, wherein the insert includes planar wall construction, with a ribbed top wall to enhance strength and traction of the top wall. The organization defines a central cavity coextensively directed throughout the insert, with a fill plug directed to the top wall and a drain plug directed through and removably mounted relative to the rear wall to permit fluid filling of the cavity to provide weight and enhanced stabilizing of the pickup bed during use of the pickup in reduced traction situations, such as in rain, snow, and the like. A modified form of the invention includes apertured spherical shells contained coextensively throughout the cavity to provide fluid baffling and minimize sloshing of water within the pickup bed.