Do I have Passlock

So, as I understand, all new GM vehicals have Passlock II of simmilar, right? I have not been able to figue out what passlock really is. Is it a feature of the keys, the cininders, etc that detects weather the lock was really turned or something like that? I have to ask because I have a new 03 grand am, fully loaded with everything except keyless entry and remote entry. The key is just a standard key, I cannot see how a resister or anything is on the key - it is just a cut metal key. So then is passlock II some sort of resister or device in the ignition lock itslef (not the key) that must be bypassed, or is it not implemented?

You have Passlock II. No resistor or anything in the key. Its a resistor based system that is in the key cylinder. Connection is made when key cylinder is turned.

Like JWorm says. The ignition lock throws out a certain resistance when the key is turned. Supposedly, if a thief breaks the ignition and turns it with a screwdriver or whatever, the resistance part won't happen...in which case the car will not start. So if you're planning on putting in a remote start, you have to get around Passlock somehow. There are three ways to do it: 1. Measure the resistance, and permanently wire in a resistor of the appropriate value. Passlock is permanently bypassed, and now your car is easier to steal. And if your resistor is slightly off, your car won't start someday, and you'll be stranded. 2. Measure the resistance, and wire in a resistor, but using a relay, so the resistor only comes into play when the remote start is on. You won't be stranded, but if the resistance is off, your remote start won't work all the time. 3. Purchase a self-learning Passlock bypass module. There are many brands available. bypasskit.com is probably a good place to start. These modules re-learn the resitance every time you start your car with your key. In my opinion, #3 is by FAR the best and most reliable way to go. For a small cost, you have nearly 100% reliability, wiring is simple, and you don't have to fuss around measing the resistance or anything like that.