We have a 2008 Acadia with a 6-disc changer. Most changers I've ever used advance to the next disc when the previous one is finished. However, the changer in our Acadia doesn't. For instance, when disc 2 is finished, it repeats disc 2 instead of going to disc 3. It doesn't matter what disc is playing, it repeats instead of going to the next disc. No one in our dealership knew what to do, or if GMC even planned it this way. I can't imagine they would have. Anyone else have this problem?