In this paper, the authors present an automotive localization system using GPS and GSM-SMS services. The system permits localization of the automobile and transmitting the position to the owner on the user's mobile phone as a Short Message Service (SMS) at their request. The system can be interconnected with the car alarm system and alert the owner on their mobile phone. This tracking system is composed of a GPS receiver, microcontroller and a GSM modem. GPS receiver gets the location information from satellites in the form of latitude and longitude.