2002 Impala - Brake Warning Light Problem

Hello,
I have a problem with my brake light fluid light coming on ever since I took it to have my oil changed and my fluids filled. It never did this before that time. It will come on a few seconds and go off in a few seconds. Then the low tire pressure light will come on. These lights flick on and off during my driving time. When I have tried to turn them off, they keep coming on. I doubt anything is wrong with my brakes, but what do Y'all think? How can I fix this problem?

Sounds like something is hanging up in the Electronic Brake Control Module (EBCM) for the ABS braking and traction control system. You can try resetting it by disconnecting the battery for a few hours or by pulling the ABS fuse and then reinstalling. After doing that go through low tire calibration again.