2000 Monte Carlo Security Light Issue

Here is the problem:

The security light come on intermittently on my car. Sometime the car will not crank, but the is only about 2% of the time when the security light is on. But the problem is you never know when the damn thing is going to strand you somewhere.

What's been done:

The BCM as been replaced twice.
The iginition cylinder have been replaced and rekeyed twice
The TSB concerning reseating and/or replacing the 3 connectors has been addressed (3 connectors were replaced).

Sometimes you can drive it for 2-3 days without the light coming on, other days it will come everytime you drive it within 5-10 minutes. The GM guys at Technical Assistance HQ are no help either.

I have taken my 2000 Monte Carlo SS Pace Car to 3 GM dealerships in the attempt to get the problem with the security light fixed. No one has been able to figure it out. Could anyone point me in the right direction. I would even live with the security system disabled if that is possible.

I just want to be able to drive my Pace Car again with having a tow truck follow me around.

Thanks

Greg