Macneill

I replaced the rotors, brake pads, calipers and brake fluid on my 2005 z71 Tahoe. I have manually bled the brakes and have good fluid coming out at all 4 corners with no air or bubbles but the brake pedal is going to the floor with little brake pressure. Please help

kevinkpk

I understand what you are posting, sit back, and think, did I leave a bleeder valve open? Next, did you start the truck as to get a vacuum to the booster?

mountainmanjoe

Could be a failed master cylinder. Brake lines can rust through too. Check everything for leaks.

Macneill

Yep, i started the Tahoe and no help. I even bench bled the master cylinder

Macneill

everything was good as far as pressure before i replaced these parts. I took even took the master cylinder out and bench bled it

kevinkpk

Well, the reason I am asking, is why the major brake job, and I see you posted the brake pedal was fine before. If you didn't replace the master cylinder I would ask why with the rest of the work done, and perhaps without an exterior fluid leak, probably an internal master cylinder leak.

Macneill

for the overhaul was for warn breaks, rotors and rusty calipers. I figured i would just replace everything while replacing the pads

mountainmanjoe

calipers are supposed to be rusty. If it aint broke then don't fix it.

tech2

did the master empty when you were replacing the calipers? did you put the calipers on the wrong side? air won't bleed out if the bleeder is down.

have some one with a scan tool perform an abs bleed.

Macneill

So i bench bled the MC and then i put plugs on the MC and confirmed the MC was good. pedal would not go to the floor with the plugs in. Then i re bled the brakes with the hose coming off the bleeder to a bottle with fluid in it and pumped the breaks at all four corners with the hose submerged in the fluid and found than air was still at the drivers rear. going to repeat the bleeding 1 more time just to be sure all air is out.