Bleeding brakes 2004 GMC Sierra 1500

[Kgrr]

Just installed new rotors calipers pads hoses on rear.

Trying to bleed and can’t get fluid to the rear to bleed, there’s plenty of fluid and didn’t lose much when I cracked lines.

How can I get it to bleed?

 

[Kgrr]

On second observation I think I did bleed all fluid from rear lines, will a vacuumed pump help me get fluid back to the rears?

[02suburbanZ71]

5 hours ago, Kgrr said:

On second observation I think I did bleed all fluid from rear lines, will a vacuumed pump help me get fluid back to the rears?

Yes, get a vacuum bleeder from Harbor Freight- they're inexpensive and worth having. If possible borrow a scanner from someone that can cycle the ABS module to assist in the bleeding procedure. 

[davester]

Maybe describe what you are doing to bleed the brakes?

 

You have filled the master cylinder, then you open the bleeder, and have someone press on the brake pedal, then you close the bleeder, and the person releases the brake pedal?  And when the person presses on the brake pedal, no fluid comes out?

[Kgrr]

That’s funny you should say, I looked online at Harbor Freight and they have a vac pump for $20 , thanks at least I’m thinking in the right direction.

 

 I tried bleeding the traditional way and only am getting a trickle of fluid at the bleeder. Pump 10 times and hold, etc, and cannot build any pressure.

[carkhz316]

We're missing something here as it shouldn't be that difficult to bleed manually. In fact, you can literally do it by gravity bleeding by leaving the bleeders open in a pinch if you're by yourself. I wouldn't recommend using the vacuum methods as while they can and do work sometimes, they also have been known to pull air past the treads of the bleeder screw and not allowing a proper bleeding of the fluid. 

[davester]

Yeah, that sounds like something has gone wrong somewhere (perhaps the MC ran dry?).  I doubt just using a different way to bleed the brakes will help with how the brakes work...

[Kgrr]

Bought a vacuum bleeder and I’m not getting fluid to the rear, the mc is full, but maybe I’ve drained all fluid out of rear lines? 
‘Driving me nuts.

[davester]

No, there isn't that much in them.  I would suggest cracking lines moving forward from the rear, and seeing where you get fluid.  But it sounds like something is wrong with your MC.

[riverbanks]

Think it's worth trying to bleed a front caliper? just wondering if you have fluid flow there

[spdeplayer2]

Had the same problem, ended up bleeding the ABS module first , then the brake lines. worked