When that young mom went missing in Montana or Idaho, with GPS and no pings, I read up on the stuff. You can disable it by not paying the bill, call them up and say, turn the thing off. But to REALLY kill it, you have to get underneath the hood, stick your hand way deep and pull the plug out from the system. Other wise, they can find you even if it’s off. Not paid. Like in an emergency, bill paid or not, you can call for help. Or lost, can be tracked bc the service is turned on remotely. Or off. Or under the hood. So. You have to have the equipment. And it has to be connected and remain connected, like hard wired, I’d say, to be able to use it. Now, whether GPS can track after the fact while it was turned off remotely but not unplugged? Or what if it’s turned off in the truck, but on remotely. I don’t know. But I’d bet it can do that but it is not revealed to the public. Big brother and all that privacy stuff. Sometimes we forget the simplest things.