I had Mr. Goodwrench check out my brakes on my 2001 Tahoe because they don't feel like there grabbing on all 4's. The pads had over 50% life left, but they still feel weak. Anybody have anything on any ABS issues or any reports on the new brake system that engages the rear during a stop to prevent the nose dive effect? I forgot what GM called this, could this defective?