How do you remove the old window motor in a 1990 buick lesabre and replace it?

To remove the old window motor in a 1990 Buick LeSabre, first disconnect the battery to ensure safety. Then, remove the door panel by unscrewing any fasteners and gently prying it off to access the window motor. Disconnect the motor's electrical connector and unbolt it from the regulator, then carefully pull it out. To install the new motor, reverse the process: position the new motor, secure it with bolts, reconnect the electrical connector, and reattach the door panel.