98 Zr2 Brake Problems

Help Changed Power Booster Master Cylnder 2 Calibers.now Can Not Get A Good Brake Pedal.went Thru 4 Bottles Of Fluid.and Still Nothing.what Am I Missing?

You may need to find someone with a TECH 2 GM scanner to bleed them.

THANKS TO ALL WHO HELPED ME OUT.FOUND OUT A BAD MASTER WAS THE PROPLEM.REPLACED IT 2X AND THE 3RD WORKS AS IT SHOULD.SO MAYBE SHE'LL GO UP FOR SALE SOON. THANKS AGAIN