Lost brake fluid from a leaking rear wheel cylinder. Repaired cylinder and filled brake fluid reservoir with one quart of fluid.I could not bleed the rear brakes. I did not try to bleed the front brakes. The car has no brakes at all. The brake lite and the abs brake lite are lit on the dash.A gm mechanic said the abs brake system must be replaced at a cost of $3600!!!! I understand that there is a Bosch pump in the unit and it sounds like it is running all the time and not developing any pressure. Could it be air in the system that is causing the problem?
The brakes worked fine before the brake cylinder leaked. Need help!!! The car isn't worth a $3600 repair job. email@example.com