If you were ever curious what makes your window go up and down in your car or truck, it's the window regulator. The regulator consists of several moving parts that work together to lift or lower your window. Like any other item on your vehicle with moving parts, eventually these parts are going to wear out and need replacing. Are you finding it difficult to roll your windows up or down? If so, chances are you need to replace your regulator. Look to Scan Tech window regulators for a great part at a great price.