I took my Blazer to the dealership yesterday for a problem with my clock. I couldn’t get it to change ever since the time change. They had to do a manufacture reset and it worked. I asked about the iPhone issue. The mechanic paired a droid with my Blazer. Did the same thing. So he looked it up on a site that only service at dealerships have access to. Turns out that Chevy is aware of the problem, but there is no fix for it currently.