This product is a windshield washer fluid reservoir manufactured by Dorman (OE Solutions) with the manufacturer part number 603-117. It is designed to fit 2011-2013 Silverado models and comes without a cap. The attachment type is screw-on or bolt-on, and it is made of plastic. The reservoir is easy to install and is not a universal fitment. It is not a vintage or performance part and is intended for front placement on the vehicle.