As of late my truck seems to be gettting harder to stop. When coming to a stop light it feels like i am going to glide right into the back of the car in front if me. In other words it seems as if I need to press the brake pedal much harder (lack of boost?) than normal. The brakes feel like they aren't grabbing good enough. Not sure if this is a brake pad issue or master cylinder or not. It cant be a hydroboost issue because the system exhibits the same performance weather the engine is on or off. The issue is noticeable weather towing or not. Need help with determining an effective course of action in starting to troubleshoot. Thanks.