My 2013 GMC Yukon SLT has a popping, squeaking noise in the left front. It is worse when first driving it or backing out with the steering turned all the way out, but seems to go away after a few miles. I hear it also when I hit the brakes hard and the front end nose dives. Could this be coming from the rubber bushings in the front? I don't think it is the brakes or axle.