I've had the same issue with my 2013 Silverado. I have an open case with the BBB and am trying to get this issue resolved at this time.
If you haven't made a claim with the Better Business Bureau, then please do. You can find you local representative at http://www.bbb.org/BBB-Locator/. They are extremely helpful at the BBB and filing a claim is pretty simple.
Please take the time and go through the process of submitting a claim. Hopefully it helps everyone with these defective vehicles.