Detach the radio and disconnect the antenna lead from the backside of the radio, removing any retaining clips under the instrument panel that secure the antenna lead. Working from the outside of the vehicle, use a small wrench to remove the mast by detaching the antenna mast and then the antenna base retaining nut. Utilize a pair of snap ring pliers or a similar tool to remove the antenna base retaining nut. Pull the antenna up and out to remove it, with installation being the reverse of the removal process.