Bleeding brakes On a 95 Chevrolet k 1500

Is there a new master cylinder involved ? Open the farthest bleeder that's where you start , Put a clear hose on it that goes up and bends down make sure it fits tight , tap the brake peddle no more than a few inches nice and slow , you'll feel a difference after a few stabs ,once it gets stiff you can push down a little more to purge out any air . Now you can bleed the brakes and say good riddance to the two person " open it - close it " dialog

If you can't get then to bleed normally with either vacuum or having some do the old pumping thing with the key turned on then you may want to try reverse bleeding, this will require a reverse bleeder unit or some shops still use them today and they can do it. Good Luck.