It's about 25F where I am located. Obviously it was a bit colder than that last night. I added PS Winterizer yesterday evening and then proceeded to drive my truck for the rest of the night until I got home. About an hour. Plugged truck in last night. Just went to start it, started perfect, idled fine... I set my heat and walked away from my truck towards my house. Just as I get to the door, she dies. And it died quick and hard. Same as if you shut her off with the key. Now she won't start, slighlty wants to but won't.