1992 Buick Regal brake lights

You have to pull the steering wheel first, my info doesn't show an air-bag? You need a steering wheel puller, the autostore sells them. Make a mark on the steering wheel and shaft before you pull the steering wheel. Make sure the front wheels are pointed straight. There will be a nut on the steering shaft, you need to remove the nut,before using the puller. Are you sure the switch is faulty?

yes the switch is faulty. diagnosed by dealership