Pull off the cable from the negative terminal of the battery and then unlodge the steering wheel. Then it will be necessary to remove the lower dash panel and the steering column cover. Remove the switch electrical connector, and remove the heads of the special screws that secure the clamp bracket to the ignition switch assembly using a screw extractor or a hammer and punch if available. Unscrew with a screw extractor, if they do not come out easily then use a punch and hammer to tighten a nut in the head of the screw and rotate it in the counterclockwise direction to remove it. As you are dealing with a GE model, separate the ignition switch from the clamp and remove it. For installation, just reverse the procedures you have just followed above and use new screws till the heads of the screws are cut off.