Can a GPS be used to track a stolen car?

A GPS system purchased by consumers for the purpose of driving directions cannot be used to track stolen cars because these GPS systems work by receiving satellite signals for the purpose of tracking location but cannot transmit signals back to a receiver. If you are interested in a device that be used to track stolen cars you could look into car services such as OnStar, Assist, LoJack, or other car specific gps tracking services that come pre-installed into the vehicles. http://www.clublexus.com/forums/gs-third-generation/475105-does-gps-track-car-if-stollen.html