Were they GM vehicles or much older vehicles. Reason I'm asking is my old Nissan Maxima which I drove in college (which btw my sister is using now in college) used to have a battery save feature. I used to see it in action when I used to wash and detail the car, if the dome light was on or the light on the door panel or trunk light, for about 3 to 5 minutes they would cut off in order not to drain the battery. This was 15 years ago in 2000. I know GM can tend to be behind in some areas but you mean to tell me there is no battery save feature in the Escalade?Not to mention one more thing that can stay on and drain a battery overnight. Had a few cars over the years that that happened to.