I have searched all over and it seems that I may be the only one with this particular issue. 2021 Tahoe. Usually, when I enter the vehicle in the garage after it has been unused for at least one night, when I am sitting in the driver's seat and I close the driver door , the horn gives me three quick chirps. This is before I even think about starting the vehicle. Occasionally it will do this away from the garage and after only sitting long enough to gas up. The key fob, of course, is in my pocket. I have been through the vehicle setup menus more times than I can remember and my service manager at the dealer is at a loss. Is anyone else having this problem?