They are removed by removing the screw in the jamb and slide out then up. They get a little tight sometimes.
I stead of replacing them, take them out and clean them up with a good degreaser then alcohol. Wet sand with 400 grit and paint them with SprayMax Satin Black Trim paint (google it and order)
Do your windshield cowl while your at it. It will last years and years and years…
Its not your run of the mill paint. You won’t need to redo it years from now