Security system

I have a 1997 z28 camaro with 81000 miles and a 5.7L v8 and I have just bought and the other day I opened the spare tire compartment and found what looked like a relay that said theft detturent shock sensor and I was wondering if it was a security feature that accually shocked someone if they touched the car. My friend has one of these systems installed on his pick-up and I was wondering if thats what it was and if it is then how can I activate it. Thank you