My brake line the rear brakes will not bleed out

MARIBIV0

MEMBER
2005 GMC ENVOY
200,000 MILES

I had to replace my rear axle and after so much frustration trying to get the cylinder bolts loose I just decided to pull the brake line off instead. I have a whole new rear axle in and it works, but since I took of my brake line the rear brakes will not bleed out after hours of trying to bleed them! Front brakes are bleeding. My master cylinder is full and little to no fluid is coming out. Help!

1 Reply

SQM

MECHANIC
6,383 POSTS

Hello,

Keep in mind that ABS brake systems have a bleeding procedure that is little different.
I have attached the brake bleeding procedures below.

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

After following these procedures, you are still unable to get fluid out of the rear, it is possible that you could have collapses brake hose or restriction in the brake line.

Another possibility is a brake pressure modulator valve. Which provides brake pressure to each wheel.

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.

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