I checked under the dash and found a toggle switch (Valet switch). Eventually I found a LoJoack site that gave valet switch directions that disabled it (turn on ignition...not engine... push toggle valet switch for a few seconds until the dashboard light stays lit... do it again to re-arm car.) So I'm ALL SET.

Thanks for tip about no switch means it's factory installed. What confused me is that it works from my remote and it has the same basic temperment as the factory on (except this doesn't flash lights but does make crazy sounds that are more than just the horn blaring.)