Well. I'm here because I too need a way to disable this "feature". I traded in my 2018 Denali for the 2020 AT4 2500 Duramax. I use these trucks to haul trained military working dogs to their final locations. The trailers we transport these dogs in rely on vehicles running to power airflow controls (heat/bringing in fresh air), lighting and water pump. Today, after thirty minutes of being in a meeting I walk out and my truck is off -- and the dogs have no heat (it's 22 degrees out). I instantly freak out thinking I made the mistake of shutting the truck off. (Why would I ever assume the truck turns off on it's own?). So I restart the truck, we begin the process of unloading dogs, as we are the truck shuts off again. Our trucks (companies) sometimes run for hours - this is just nature of the business. The fact we can not disable this feature is an issue. I have already spoken with the dealership to return the vehicle as I have less than 100 miles on it. The truck does not work for me because of this one simple "feature". Yes, I'm sure there are work arounds as some of you posted in here -- "restart the truck when it goes off". This does not scale. I'm in disbelief that they did not provide an option to turn this off..... so there is no fix ... this is confirmed... as they are taking my truck back because of it.
