I have a 2008 Silverado.when I apply the
brakes they go to the floor.I could pump
them up but now the peddle still goes to
floor.I checked for leaks and found
none.After pumping them what little bit of
brakes I have seems to hang up for a
moment.Could this be a master cylinder
If the brake fluid level has not gone down in the master cylinder, then yes, chances are it would be the master cylinder.