2011 Silverado Driver
2011 NNBS 1500 with 42k on it and I'm the original owner. Since day one my brake pedal has had a short stiff stroke to it and it really bit down when I needed it to. Starting yesterday the pedal has been randomly really soft, like going all the way to the floor soft. Sometimes it feels like its gonna catch in the normal place but then it goes all the way to the floor again and other times it has the short stroke to it again. I checked the reservoir and all the lines and theirs no loss of fluid and no signs of a leak. I'm kinda at a loss here but from some googling I've seen several people report these symptoms on their nbs and they say mastercylinder. Any ideas on what it could be? No abs or stabilitrak lights either.