KNOW WHERE TO LOOK
Everyone who is a Targeted Individual is under 24 hour surveillance by the United States Government. They have radios in their homes, GPS devices and radios and even cameras in their vehicles and RFID and GPS implants in their bodies. Some devices in all three cases are transceivers, able to receive and send frequencies that locate you and send frequencies to your body to cause pain or activate your implants.
However, if you remove the devices, they will just put them back and do something to retaliate and punish you like giving you a new implant.
Below are some documents and websites which show you some of the devices installed in your vehicles.