The only things that I can think of that would cause this would be a leak, bad master cylender, rear brakes out of adjustment. Yes, if the ABS is activated, it may go down further, but not any other time.
Since you have rear drum brakes, they may be out of adjustment. That is why I asked you what type of brake system you had. That could give you a lower brake pedal and one that would pump up, but I would think they would have checked them.
Regardless, it could be a master cylender or other component. I would ask for the general manager if service won't help you. It isn't normal and if your luck is like mine, it will go bad right after the warranty runs out.
Let me know what happens and if I can help you in any way.
Friday, August 14th, 2009 AT 12:41 PM