wow .. the more i learn about this "VATS" or "passlock" system the more im convinced thats where the problem is ...
as i mentioned .. i replaced the ignition switch 'mounted under dash on steering column ... and also the key switch 'Ignition Lock Cylinder ..
i now notice that the new 'Ignition Lock Cylinder does have the two small wires (one white / one purple) wrapped in the orange tube .. but .. the key that came with the new 'Ignition Lock Cylinder does not have the "resistor pellet" as did the original key for the old ignition lock cylinder .. although the counterperson at my local advance auto assured me it was the right part for my vehicle ..
can this be right ?
there is a great article located here on this subject ..
http://www.usautomotive.co.uk/tech/Anti-theft.asp