I've heard about checking door and trunk sensors. Anything else that obvious that I should check?

First of all....try this:

Roll down your driver'* window (weather permitting).
Lock the car with the key or the fob.
Wait....I don't remember how long. Try 5 minutes. Now reach in through the window, unlock the door MANUALLY (not power), and open the door.

Right now, do you have a security light on the dash? If you do, when is it on?

The security light comes on when I lock it with door switch or keyless entry and goes off after 1 minute.

that sound like mine

That'* normal. Do the test I posted. You'll set it off.

I just checked mine and it works very well. Horn honked and lights flashed.

It'* a very discreet passive system. I was very surprised the first time I accidentally set it off. It'll even go off if someone tampers with your trunk lock cylinder. If they slide-hammer it, the alarm will sound. Neat effective stock security system. And it works very well with VATS.

Hard to steal these cars, but they can still break in.

Willwren wrote:
Even ol' dad knows a ghetto way around this, better to upgrade it your in a high risk area?

I think he'll be ok in the middle of Wyoming...