Oh now isn’t that damning. Happen to remove your cars tracking device the same day Heather goes missing.LM states the SD card was detached from the truck December 18, 2013. He found a "message fragment" at 12:06 AM. At 12:07 AM (12-18-2013), the SD card was detached from the SYNC module, at which point, the navigation would no longer function. When the SD card is removed, there is a prominent warning alerting the driver the card is detached, and the navigation system is not working.