My 2014 Z51 had a whinny noise coming from the air compressor from new on. At 700 miles the dealership replaced the compressor and the noise was substantially reduced and was not all that noticeable. Now with 2700 miles on the car the whinny noise is starting to get louder but not quite as loud yet as it was when GM replaced it. Does anyone else have this problem? I haven't taken it back to the dealer for their opinion yet.