I just purchased a 2014 enclave with 86000 miles. my problem, I set the radio presets by holding the preset button till it beeps and it shows the station set.next, I got to Bluetooth and hit the delete all button to remove the previous owners 5 phones and they disappear, I then pair my phone. all is well that day then the next day all my info is gone and the previous owners info is back. I have done this 4 times with the same results. I have call my salesman 4 times and he's always going to have a buick specialist called me and so far it hasn't happened. any help would be greatly appreciated.by the way, my dealer is 2 1/2 hrs from me.