Surely you can program it out?
I know my custom tune in my ‘97 had VATS programmed out.
You may have been able to on earlier ones. On the LS1 PCM the VATS(vehicle anti theft system) has moved to the BCM(body control module) , so it cannot be programmed out. It is a question that came up in many forums, it would be nice if you could tune it out, but its not possible.
Got the schematic of the VATS system, as I was seeing what other options there was around it.
Settled on putting a fixed resistor value in the loom where it would usually measure the resistor in the key.
Measured my key and it was 1.870ohms. Used a 1K8 and 70ohms in series.
The connector the pair of wires plug into from the barrel with the resistor key contact.
The pair or resistors ready to add into the wires.
Stipped off bits of insulation ready for the resistor.
Wrapped the resistors around.
Solder the buggers in there, added insulation tape. Tidies it away, and then tried to start the car. Started no troubles at all. A job done well that shouldn't need to be done again. It was club night tonight so was a good test.