If you're working on a vehicle with power windows, disconnect the negative cable from the battery. Remove the door trim panel and watershield. Remove the window glass. Disconnect the window motor electrical connector. Carefully drill out the rivets that secure the regulator base plate to the inner door panel. Remove the nuts that secure the glass guide channel to the door. Remove the regulator from the door, along with the power window motor if equipped, and detach the window motor from the regulator if necessary. Attach the regulator to the inner door panel using rivets or suitable bolts, nuts, and washers, ensuring they are tightened securely. The remainder of installation follows the reverse order of removal.