How do I replace a Window Regulator on a 1989 Buick?

To replace the window regulator on a 1989 Buick, first remove the door panel by unscrewing any visible screws and gently prying off clips. Disconnect the window motor and regulator from the power source and remove any bolts securing the regulator to the door. Replace the old regulator with the new one, reattach the motor, and reassemble the door panel, ensuring everything is securely fastened. Finally, test the window operation before fully reassembling the door.