abs light and brake light and buzzer comes on on 2003 GMC Yukon XL 1500

abs and brake light both come on when i star my car or drive a few miles then buzzer/lights come on checked fluids all thats fine had new brakes put on front/back and about two weeks or so thats when the light/buzzer started

Asked by for the 2003 GMC Yukon XL 1500
2 answers

I replaced mine. You have to remove it first. Was a little difficult to get to but I covered it with some plastic not to get too dirty. Sent the old one off to be rebuilt. Saved myself THOU$AND$. Works like a charm now that I replaced it. Just buy a small ratchet set.
abs failure is usually due to a sensor failure at one of the wheels. have a shop check it on a scanner tool to identify the real issue.