GPS tracker

What sort of car is it? What area are you trying to track it, on the street outside your house at night or where? Unless it is extremely valuable to others, it would be rare for a tilt tray to take it away.

There's a fella on another forum I go on who sells what you are asking about. I have no actually experience with his products, but am certainly considering fitting it to a few trailers I have.
His name is Shane, 0418 194 647
ccatrackers@gmail.com
www.caravanandcaralarms.com.au

Can all be done on a computer rather than your mobile. As you said you have the tracker with a sim card - I use Optus long term pre paid - $30 and last months.

You program the tracker by using specific SMS codes from your mobile - all covered in the tracker instructions. You can then use an app on your phone to receive tracking and position information (Ez Tracker is one) or you can create a free account in Miitown get the tracking information sent to that website and viewed on your computer.

For spot positions you can just sms from your mobile to the tracker (eg *locateaddress*) and the address is provided to your mobile phone and you can type that into google maps on your computer. There is another sms code that will you can get lats and longs that you can type in google maps as above to get the position on a map - Ok when the vehicle is out of town.

good luck

Have a look at Tile tracker and Leash It ,no SIM card needed, there are plenty of others out there too , just search tracker on YouTube