The bluetooth sound quality on my 2015 Traverse is so bad that it is unusable for phone calls. The people that I talk to cannot make out my words to the point where some have hung up on me out of frustration. I did not have this issue on my 2011 and I am disappointed that the quality has degraded with the newer model year. Please help me determine how to fix this so I don't have to to buy a different car. We are a loyal Chevy family and this is my third Traverse, however, this issue is important enough to cause me to switch to a different brand.