General Motors has a rear seat alert available on some models - basically, if you open the rear door at the start of a trip, the car reminds you to retrieve wha

General Motors has a rear seat alert available on some models - basically, if you open the rear door at the start of a trip, the car reminds you to retrieve whatever you put in the back seat. http://abcnews.go.com/US/technologies-designed-prevent-hot-car-deaths-work/story?id=47991074 http://abcnews.go.com/US/technologies-designed-prevent-hot-c... Disclaimer: I work for GM, but not on this tech.