If you're a little familiar with vehicle wiring, about $10 spent at Radio Shack and a couple of hours [actually, if you're a tinkerer you can do it in about an hour] time spent under the dash on the driver's side, and you can do the job yourself. After you're through, you flip a hidden switch [or even an exposed, unmarked switch], and even with the keys, you can't start or run the truck. I put one in mine and it's a nice little extra bit of insurance when you walk away from the truck... . either in a shopping center parking lot or in your driveway.