Who's fought Silverado/ Sierra brake problems? and won?

Here's what paul said:

"Has been adding brake fluid ? I've seen several cases where the brake booster would b full of brake fluid .... also seen the front brake lines will collapse on the inside of the rubber brake lines ."

Based on that, I would check to see if the booster has fluid in it. I told him you probably haven't had it long enough to see if it's losing fluid.