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K. Wiggins
K. Wiggins, Chevy Technician
Category: Chevy
Satisfied Customers: 2509
Experience:  ASE Certified Technician AA in automotive Technology, 15+ years in the trade
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Brakes went out. Filled with fluid and drove around block.

Customer Question

Brakes went out. Filled with fluid and drove around block. Had to refill fluid. Large can of fluid in two days. No leaks anywhere.
Submitted: 1 year ago.
Category: Chevy
Expert:  K. Wiggins replied 1 year ago.

Hello, if you don't see any external leaks it is most likely leaking at the rear seal of the master cylinder and going into the brake booster.

To check this you can unbolt the master cylinder from the booster and check the rear of the cylinder.

Be advised if that is where it's leaking, the brake fluid will damage the rubber diaphragm in the booster causing it to eventually fail.

Customer: replied 1 year ago.
Thank you
Expert:  K. Wiggins replied 1 year ago.

You're welcome, let me know if that's not it and we can work further if needed.