2 weeks ago my brake light and ABS light came on, I thought I just needed to replace the ABS sensor, I have not gotten around to it yet, I did put on a new set of tires the other day, and as soon as I started driving with the new tires I notice that when I apply the brakes I feel a slight shudder in the truck, almost like the ABS purging, but it shakes the whole truck, not sure what the problem is, anyone have any ideas?