How to block vehicle gps tracking?

Hi, Eden
First of all, it must be noted that GPS tracking is not limited to external tracking devices. Because many programs in smartphones now have GPS capabilities, both GPS and cellphone signals must be blocked to prevent tracking.
Now, the center for personal security has developed a device called a GPS signal jammer that can block GPS signals. There are also versions of the product that specifically interfere with cell phone signals to protect your personal whereabouts from being tracked.