I purchased a Certified Pre-Owned 2014 Siverado 4x4 last June (2019) with 19000 mile on it. I have had the vehicle completely shut off, like some one pulled the plug on it, three times, twice in one day and one more time two days later. It's at the dealership now, the system did show some issues with it shorting out but unable to find out whats wrong. They did check ground "PIT5405" and was good. They are trying to duplicate the issue so the can fix it, not realy sure what that will tell them. I'm just afraid that I purchease some ones problems and now I'm screwed.