if they know your previous name/address/phone number I can think of many ways to extend that information to find out where you are now. Lets go down the list of the ones I can think of shall we?

- They contact the post office to get your forwarding address, or ask them where they think you are.

- They contact the DMV to get your current residence.

- They contact the phone company and ask for a forwarding address or phone number.

- They contact any friends or relatives, and will most likely pretend to be a friend trying to find you, someone who is "concerned" about you.

Keep in mind they can google you, make connections about where you might be living. I wouldn't put it past these people to goto your previous residence and start asking everyone there where you moved. Or at a minimum what you moved in, say you moved in a Uhaul and they narrow the date down to a weekend back in April.

Now they goto Uhaul and slip the guy $20 to find out who rented on that weekend for that location. Or everyone who rented that weekend and they narrow it down using other methods.

Everyone leaves tracks, these are just the most common ones I can think of.

My best advice is, park your car in a garage of a friend or somewhere far away from you. Then bike/walk to it and make sure you aren't being followed. Once they get near, they'll spot your vehicle and then they can hook it up and drag it off in less than 30 seconds. You won't have a chance to stop them.