My 2005 Chevrolet Aveo brake fluid reservoir is empty once in a while and a few hours later, it is full again. What is the problem? I changed the brakes and had clean fluid put back in. It is empty once and then full later.

  • Did you bleed the brakes properly when changing the fluid?
    – tlhIngan
    Dec 7, 2017 at 6:04
  • Any chance you are looking at the fluid level sometimes with the hand brake on and sometimes with the hand brake off?
    – tlhIngan
    Jan 5, 2018 at 1:41


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