Theft deterrent system is on and car won't start what can i do

Try this, turn ignition to on, do not crank the engine and wait about 10 seconds; the anti-theft light should go off. If it doesn't, repeat it again and if you have a second key, use that one. It worked for me, hope it works for you.

2010 Buick LaCrosse went into deterrent theft lock how can I disable this

Can I still drive the car with service theft deterrent system on?

OMG, thank you Jorge. Just spent 2hrs trying to jump / move my truck. But at least I'm able to get kids to school in the morning.