Hello, I am new to the forum and hope I am posting in the right place. My apology if I got it wrong. I have recently purchased a '14 Z51 M7. I am having a problem with the infotainment screen sometimes flashing and even going black. I have read that I am not the only owner to have this problem but I haven't seen anything definitive about the resolution. I understand that there was a TSB and a software update GM supplied for the 2014 models that have this problem and that this update may resolve it. Thus far my local dealer says they can't find anything about that. I have also read that the problem could be a bad connection on a wire that goes to the screen aggravated by raising and lowering the screen. Does anyone know any details about the software update that could help me guide my dealer to find out about it? Assuming that they find the update roughly how much should I expect to pay to have this done? In other words, are issues addressed by TSB or a software update done at no charge or are they billed as normal repair? Obviously, I'm out of warranty. Or is it probably the bad wire causing this? Any guidance on any aspect this problem would be much appreciated. Must get it fixed and drive! What a fun car!