How do you replace the antenna on a 2000 Cadillac Eldorado?

To replace the antenna on a 2000 Cadillac Eldorado, first, ensure the vehicle is turned off and disconnect the negative battery terminal. Remove the interior trim panel near the antenna base, then unscrew the antenna mast and disconnect the wiring harness. Install the new antenna by connecting the wiring, securing it in place, and reattaching the trim panel. Finally, reconnect the battery terminal and test the new antenna for proper function.