97 Tahoe dash brake light

[61_FL_Apache]

Over the last few months, my brake light on the dash comes on when braking. You can feel it in the pedal when it comes on and goes off on the next pump of the brakes.

The brake fluid is fine, no leaks and the brakes work as well as usual.

If its quiet in the truck you can hear a click kinda sound when the light goes off. So it sounds like its right at the pedal inside.

Any ideas?