Park the vehicle on a level surface, apply the parking brake, and disconnect the battery.
Remove the door trim panel. This can be done by removing the screws that hold the panel in place, and then carefully prising the panel off with a plastic pry tool.
Disconnect the electrical connector for the window motor.
Remove the bolts that hold the window motor in place, and then remove the motor.
Install the new window motor by reversing the removal steps.
Test the window motor by operating the window switch.
Reconnect the battery, and then reinstall the door trim panel.