Brake pedal goes to floor

DENNISAUGUSTJR

MEMBER
2003 CHEVROLET TAHOE
5.3L
V8
2WD
AUTOMATIC
104,654 MILES

On the vehicle listed above the brake pedal goes to the floor. I change out the rotor tried bleeding the brakes I wasn't getting no fluid anywhere. So I took the lines off the master cylinder and there's no fluid coming out master cylinder. What can cause that? Also it has a new master cylinder on it.

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

Did you bench bleed the master cylinder? If not, then you most likely are just pushing and pulling the air that is trapped in the chamber.

Here are some guides that will help with this:

https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor

https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

More then likely you will have to replace the master cylinder again because if you didn't bench bleed it then it could have damaged the seals on the inside or it is possible that the master was faulty out of the box.

Either way, if you are getting no fluid out of the master then it is failed. Let me know if you have questions. Thanks