BEHIND THE BRAKE PEDAL
probbly the fuse box....
GM. did not use a INERTIA switch.
either dimmer switch or blown fuse If you are saying that the tail brake lights are working but the third brake light is not....It may be a defective turn signal switch in the steering column.
It can be your switch or the fuse try checking the fuse first.
How do you replace a break light switch on 1995 Chevy Tahoe
I have a 97 Tahoe and the brake lights were not working and the problem was in the emergency flasher switch. I just jiggled it and the brake lights worked so am thinking you might have the same problem. It could also be the brake pedal switch located right on the pedal arm.
If the fuses and bulbs are okay I would blame the signal switch assembly. They call it a multi-function switch these days.
Yes they indeed have brake lights...
Chevy Tahoe Ignition Key Starter Switch
headlights
If your brakes lights are not working and all of your other lights are OK try replacing your "brake stop switch". You may have to have either your local auto shop or local dealer replace the switch because it's hard to do yourself. I had the same problem on my Tahoe and replacing the brake stop switch solved it right away.
If the warning lights go off in a Chevy Tahoe, it indicates a problem. In order to reset these lights the problem must be solved.