As both Rhawkins52! and I have experienced on very cold starts, (-21c Or -6f or colder) it seems the starter runs on after the truck has started. On two separate occasions the truck started and immediately shut down with the sound of the horn. When I started it again it started fine but did make this starter run on noise that lasts a few seconds. Any cold starts -15c (5f) this noise does not exist. Has anyone else experienced this?