The luxury of using your power windows diminishes when the Cadillac window regulator begins to fail, forcing you to struggle with an obstreperous window that refuses to move. If you have determined that your Cadillac window regulator is at fault, then replace it with a set you can purchase here. Unfortunately, that's the easy part of the task. The hardest part is taking apart the door panel, then reassembling it. To do that, first remove the lower and upper door trim panels and speaker amp. You also need to unplug any wires leading to the power window switches power door locks and remote mirror controls, as well as any other accessories. Then, peel back the seal. One hint: map out or mark the position of all components before you taking out these components. There are some special tools to help you with this task, but most of the work can be done with the basic tool set you probably own already. Be very careful of the spring and lever mechanisms found in many window regulators - they are extremely powerful and you can easily lose a digit with these components. Take time after installing the window regulator to apply a silicon lubricant to the gears and other mechanisms as a preventative measure. Lubricating your power windows will help protect them against the stress of dirt, heat, ultraviolet light and snow, which eventually gum up the mechanical parts.