Do I Have Factory Anti-theft???

J Rill...thanks for the help....it works like a charm.   Could I put a switch in that would put the factory resistor back into play.  Like if the trimmer drifts due to temperature? 

If you are concerned about losing resistence, you can buy a resisitr within 5% of the value and put that in there.  I know you already got it working, so you must have answered the two above wuestions about cutting or tapping, but the only wire you cut is the yellow wire and you only tap the bulb test wire and the passlock ground wire (Black). 

Yes, If you want to you can put a SPDT switch between the computer side of the yellow wire and the resistor and hook it up with the computer side in the middle, the trimpot on one side and the key side on the other.  Radio shack sells them.  Let me know if you need more info. 

J.Rilla..FYI....96 Cavalier....must have changed the color code on the passlock.   The passlock wires are in a ribbon cable with two black wires and one black with a white stripe...white strip is white, 2nd black wire is the black one, 3rd black wire is the yellow.