04 Yukon, can't get brakes bled.

[Red Rider]

Yeah. I always wondered about pumping the brakes into that less traveled zone of the MC. It is probably what does a MC in, unless vehicle is bled fairly often. Never thought of the block of wood idea. that is smart.

So I would imagine you really need a computer to bleed out the ABS system properly. otherwise, you are keeping some potential moisture in there.

 

[iamdub]

So I would imagine you really need a computer to bleed out the ABS system properly. otherwise, you are keeping some potential moisture in there.

A computer makes it easier and removes all doubt. But, I don't see how what I do isn't just as effective. Just as I begin to apply pedal pressure I turn the key. So, the fluid is already trying to push towards the calipers before the ABS solenoids are opened. As soon as the solenoids open, the fluid, air moisture, etc. is pushed out of the ABS module and further down the lines, followed by the fresh fluid coming in from the MC. When I flush a brake system, I do it mostly through the right rear at first. I let the bottle fill with the old brake fluid (which is darker) until the fluid coming into it begins to get lighter. By this point, there shouldn't be any bubbles. I then hang a second bottle on the left rear and bleed both rears simultaneously until they are only flowing the new fluid. Of course, while I'm pumping the pedal I'm doing the "key on trick" every few sets of pumps. This method has never failed me and I've gotten a firm and very responsive pedal every time. GMs are known for having softer pedals even when new. Replacing the flex lines with braided steel lines works wonders and running a hydrabooster will make it feel like you could stop on a dime while towing a camper.

 

[Red Rider]

Thanks. I will try that. Hopefully this weekend.