Brake warning alarm stays on

I have a 2007 GMC Yukon that the brake light and warning alarm is staying on. My park assist button keeps blinking at the same time. It stops alarming when I come to a complete stop and sometimes doesn't do it at all. Of course it doesn't do it for the mechanic. I checked the brake fluid and it is fine, not sure what else to check. Any help would be appreciated.

did u change your wheels to bigger one ?? because if u change the wheel to bigger one without programme the new tire & wheel size the sensor of ABS will take a wrong signal then the ABS light will goes on . I hope to be benefited .

My traction and BLS light is staying on in my GMC Yukon 2007 I change all the fuses is there anything else I could check before I take it in for anything major