Blazer Brakes

I am having issues with my brakes. I have a 99 blazer 4WD. I had no pressure to the rear brakes. I replaced the rear calipers that didnt help so i replaced the master cylinder and that helped but no matter how much i bleed them they are still very spongy. Now the there is fluid coming from the between the master cylinder and the power booster and I dont know why. I tried bleeding the ABS and nothing comes out this is really a pain. Does any one have any ideas?!

I am having issues with my brakes. I have a 99 blazer 4WD. I had no pressure to the rear brakes. I replaced the rear calipers that didnt help so i replaced the master cylinder and that helped but no matter how much i bleed them they are still very spongy. Now the there is fluid coming from the between the master cylinder and the power booster and I dont know why. I tried bleeding the ABS and nothing comes out this is really a pain. Does any one have any ideas?!

replace the ABS valve module. many have had this problem. when pads are replaced the old fluid is pushed back into this assy, then you get this issue. also if the ABS valve module is activated when bleeding this may fix this issue. special tools/brake controller is required to do this type of bleeding.

In my case I would suggest running new lines bypassing the ABS at least to prove the theory.
However my ABS light was on when I bought the truck and I have no desire to fix it, so its up to you. I wouldnt think that valve unit is very cheap though.

Please post back your results.
Joules