04 grand prix no break lights new bulbs ,new switch and on the info display says service break apply sensor

see if power goes to the brake switch, and power comes out of it when brake is depressed. If not, fix that. If power goes out, then there's a short going from the switch to the bulbs. Many guys will just run a new wire from switch under the car to the brake lights, as the rest involves computer modules which you would then bypass making it simpler

nope there's no power

is it possible it could have something to do with the multi-function switch