for Chevrolet C/K Series Pickup C10 C20 C30 K10 K20 K30 Sliding Window Glass Back Slider 4 Panel Four-Panel Design and this window fits the models as below: 1981-1986 Chevrolet Pickup C10 ; 1981-1986 Chevrolet Pickup C20 ; 1981-1986 Chevrolet Pickup K30 1981-1986 Chevrolet Pickup K10 ; 1981-1986 Chevrolet Pickup K20 ; 1981-1986 Chevrolet Pickup K30 1981-1986 Chevrolet Pickup C30 ; 1981-1986 Chevrolet Pickup C30 This is a slider window only, gasket sold separately, CRL aftermarket slider gasket will be need to install the window.