I've have not heard of any talk about this anti-theft system. I'm just wondering if anyone knows more about it.

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more info here
http://www.nohotwire.com/security_alarms.html

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I had it on my Avalanche when I had it. In my truck it killed power to the fuel pump and the ignition without the plug. They would have had to tow it if anyone wanted it. I felt safer with it. In my eyes worth the price. Installer came from Florida while I was living in GA to install for me. Also never had any problems with the plug or the truck after install. Just dont loose the plug!

 

I remember in the 90s they have something like this that use a chip to plug in it's called pro lock..small chip you have on you and once you go to start your car you just plug the other part in..it's nice but like the op said just don't lose the chip.

 

My dad had it on his truck he sold. It worked great but after awhile he got tired of always having to put the plug in and take it out so he just left it in all the time.