I NEVER do ANY software updates unless I'm having a definite problem and I SPECIFICALLY KNOW that update will address that problem. When Apple has an update for my Mac, you can click on a link, and it will detail EVERY single thing that update does. General Motors does not do this. I have never done any updates on my new Tahoe. I'm perfectly happy with how it is working. Remember, it is very common for updates TO BREAK THINGS that were working or to TAKE FEATURES AWAY from you that you enjoy. A friend did a software update on his vehicle. Now every time he puts the car in reverse it emits a loud beeping sound like a dump truck backing up.