Chevrolet or GMC Truck Under-Seat Storage. (new/never used or installed). The under seat storage compartment converts the area under the rear seat into a secure storage area. This unit is made of molded polyethylene material designed to hold anything from tools to toys. The under seat storage also features a locking lid with GM logo to deter others from taking anything that may be of value. Use in extended cabs only.Includes complete installation instructions. New $405.00, Asking $200.00.