[GTP Dad]

Try the crank position sensor and the ignition module. The CPS when it starts going bad will cause the vehicle to stall without warning. It will get progressively worse. If that does not fix the problem then the next step would be to replace the ignition module as it may be overheating.

Finally, did the security light come on and stay on for a few minutes when it stalled? If so that may be where your problem lies.