Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Has the up and down play in therear axle been checked.The axle rides on a bearing in the end of the axle tube. I have had some that the bearing started to fail,and the axle shaft had to be replaced,since the axle shaft acts as the inner bearing race on that design.The rear rotors also have the parrkng brake shoe inside,I have not had a problem with one, but it is possible they can be giving you the noise if there is a problem with them.here are some illustrations of the park brake and axle.
I just recently purchased a 2004 Tahoe with 155000 miles