A vertical sliding window assembly can be coupled to a flange of a vehicle. The vertical sliding window assembly includes a first fixed panel and a second fixed panel adapted to be fixed to the vehicle. The first and second fixed panels have a top edge and a bottom edge spaced from each other. First and second vertical tracks are coupled to and extends between the top and bottom edges of a respective one of the first and second fixed panels. Each of the vertical tracks have a bottom end adjacent the bottom edge of a respective one of the fixed panels. A sliding panel is movable along the first and second vertical tracks relative to the fixed panels. The bottom end of each of the first and second vertical tracks terminates between the top and bottom edges of the fixed panels.