Hey All, Im a Newbe, so forgive me if I started this in the wrong place. I am having issues with my Brakes. I had a full peddle one day on the way home from work and the peddle went to the floor and then came back when I tried again. Then the other day they went to the floor almost and only the front brakes are now working. I have a lift, so I checked under the truck and found no leaks, the reseivor is full! The pump for the booster is full. My first through was the booster, so does anyone now of a test to insure I am going in the right direction? Thanks for your help!