I have a 1995 2wd 4dr v6 blazer. Disk brakes in front, drums in rear.

Brakes have always felt decent. Not as good as my 03 silverado with disk all the way around. Recently my wife started complaining about having to push it all the way to the floor to get it to somewhat stop. Took it to a brake shop and they told me it had air in the master cylinder, the master cylinder was bad, the brake booster was bad, and I needed to check the check valve. They never actually did anything just looked at it and pressed the brake pedal a couple of times.

They wanted to much and I didn't think those where the problems. Every test I preformed indicated the brake booster was working properly, the check valve worked. I replaced the master cylinder without knowing if that was the issue.

I replaced the master cylinder after bench bleeding it anyways. Rebled all 4 corners again and not getting air from lines. Now the brakes are iffy on first pump but the second it stops pretty good.

Any thoughts or ideas?

 

I believe I found the problem, or it found me. Wheel bearing went out last night. I didn't think to check that because they were less than 3 months old. Hopefully when new parts show up later today everything will be fixed.

 

I don't see a bad wheel bearing causing the problem with braking but I'm glad you found it- check your rears for excess wear and adjustment - Mine on my toy was getting a little spongy and the rear self adjusters were bad and the PO before I built the toy had installed the lower springs on wrong binding the self adjusters - while i was in there I replaced the worn shoes, drums and hardware kit and gravity bled the system - good and solid now

 

With the wheel bearing going out it kept pushing the caliper back in l, changed the bearing and put new pads on along with rotor and bearings, seals, brake pins and it's as solid as a rock. Brakes better than my 03 silverado now. Since the 2nd has a different hub/rotor setup than 4wd is probably why I has the issue.

The bearings can be replaced rather than the whole hub/rotor assembly.

 

I stand corrected lol - in my pea brain if the bearing was bad enough to allow rotor to shove the caliper back in the wheel was on the verge of falling off - Live and learn, never too old to learn something new. Thanks for posting the result

 

ive never seen a booster cause a pedal issue, its basically a rod through the middle of it. if the booster goes out you just lose power brakes.

ive seen the bad bearing thing a few times, it basically tips the rotor on a angle and pushes the caliper in a bit