94 suburban no rear brakes

[DanielPace27]

Hey guys im having a hard time bleeding the brakes on my 94 k1500 suburban 5.7 with abs. I bought a new combination valve to try to fix the issue but I haven't been able to get fluid to the rear abs bleeder screw. Bled the back brakes and can get fluid but just no pressure. I made a device to stop the piston from clicking over when I'm bleedy the brakes.just no luck any Ideas?

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[DanielPace27]

Also what are the two things on the bottom of abs. It's the third picture

 

[Schurkey]

Why is this in "Engine Performance + Maintenance"?

I made a device to stop the piston from clicking over when I'm bleedy the brakes.

I have no idea what you're talking about. What "piston" do you mean?

There's many ways to bleed brakes. HOW are you trying to bleed them? Stepping on the brake pedal? Gravity? Pressure bleeder? Vacuum bleeder? Reverse Injection? Something else?

What does your service manual say about using a scan tool to activate the ABS while bleeding?

 

[DanielPace27]

It's in engine because the other forums didn't fit but its a problem where I can't get abs to bleed

 

[DanielPace27]

The piston is the little device that slides over when you lose power to one set of brakes so that you don't loose all your brakes if you lose one