Suburban Brakelights not working

My 2003 Suburban brakelights are not working. All three are out. I checked the fuse box inside and under the hood. All the fuses seem to be okay. What could be my problem?

Seem to be ok? Did you pull each fuse and check it? If you fail to find a blown fuse, check the wiring harness, but really sound like a fuse or the brake light switch. Have you checked it yet?

How do I check the brake light switch? Thanks

Found the brake light switch under the dash attached to the brake pedal. I moved the connection around and my wife noticed the brakelights came on. At times it would come on and then I would move it around and then it would not come on with pressing the brake. So I moved it again and now it seems to come on when pressing the brake. Should I go ahead and change it or do you think it is okay. If I was to change it, is it difficult? Thanks, Ron

It's easy to change and I would change it.

Thanks, Ron