Brake adjustment, as in rear drums? I did have an ABS light come on a few days ago, but went off after I drove it about a block. I will have to check if it stored a code.
I had the same issue yesterday. Drove my Burb over 200 miles with no issues. I went to park it and the brake pedal went to the floor! I almost tagged the truck in front of me. Surprised the crap out of me!