I changed braked pads on my 99 K1500 Suburban, and afterward noticed that they brakes were dragging. I did some research and decided that maybe I should have replaced the calipers too, since I have almost 200K miles on it and I'm sure they've never been replaced. So I went to the parts store and purchased new calipers, brought them home and installed them. I still have dragging. When I brake, there's a rough sound coming from the front brakes, like the pads are bad, but they're brand new. And when I drive they rub, like the calipers aren't letting go completely, which shouldn't be the case since they're brand new. Any ideas?