I've had my 2020 Silverado for about 14 months. I thought I would like the auto stop feature at first and it did great in my hometown. Not much traffic at all here.
However, when I went to visit family in the Houston, TX area I did not like it at all.
Stop and go traffic along with bumper to bumper stop and go was really bad. I got to thinking, what if the truck wouldn't start one of these times? I turned it off and everything was normal.
I never considered putting a device on to turn it off. I just automatically press the button when I start the truck. Easy peasy.
I love my truck with the 2.7T 4 banger.
Good luck!