Hey guys, I've always loved the Cadillac CTS and I finally got my first one the other day, it's an 04 3.6L with 50k miles in great shape!! Very happy with the car. However I just noticed the other night while driving, that after a little bit of driving (not driving fast, or accelerating fast) that there is a weird sounds that sounds a lot like belt squealing however I'm pretty sure it's coming from the rear end, not the engine bay and whenever I press the brakes it stops. And it doesn't come back immediately but it does always come back. Does anyone know what it might be and how I could fix it? I almost think it's a brake pad bracket but it doesn't make sense how it would come and go unless it's really loose. Thanks guys!!