I have an 03 TrailBlazer. When I go to stop, the car jolts (that's the best word I can think of) like it would if my rotors were bad. I've had my tires taken off and the brake pads and rotors are perfect. Also, they checked out my calipers and those were fine. My bushings are deflated/are in bad enough shape I need to replace them. Do you think that is what could be doing it?