A vehicle includes a chassis, a cab, a cargo body, and a window assembly. The cab is coupled to the chassis. The cargo body is coupled to the chassis, rearward of the cab. The window assembly is positioned on a door of the cab and includes a first window, a second window, and a seal. The first window is fixedly coupled with one or more support columns. The second window is translatably coupled with the first window, and is translatable between a first position and a second position. The seal extends between the first window and the second window. The seal is fixedly coupled with the first window and is configured to sealingly engage the second window when the second window is in the first position.