How do I fix security system lockout problem

Hello, do you know if you have some kind of non-GM original alarm system attached to the vehicle? Many times, devices are sold at dealerships. If so, have this removed and recheck. If there are no add on devices, then you'll need to have some diagnostic testing performed. I can't imagine why the vehicle would stall as a result of a factory equipped anti-theft system -- unless perhaps electrical battery power is compromised? Hard to say. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops