A cover is provided to protect steps leading to a cab of a vehicle from accumulation of mud, snow, ice and other debris when the vehicle is driven. The cover is pivotally mounted for movement between an open position allowing a vehicle operator to climb the steps and a closed position covering the steps from top to bottom to maintain cleanliness of the steps as the vehicle is driven. The cover can be opened and closed from the top of the steps, either manually or with an actuator. The cover is normally closed when the vehicle is moving and open when the vehicle is stationary.