I have a 2014 Silverado that I purchased years ago. Several occasions, I’ve had to jump start the battery due to it being dead. I’ve taken it to the dealership several times over the years. This last time and after spending over $1500, the dealership told me they did not know why or what was draining the battery. They thought it was the alternator but the problem continued. It only happens when the truck has been sitting up for a day or two. I am beginning to loose trust in Chevy trucks after reading the same issues others are having!!