Confused!!!
 

I have a 2004 Cadillac SRX. It randomly shuts down while driving. Once stopped, I can often restart it again. Sometimes I have to let it sit a while, and then it will start. I've had the throttle sensor looked at already. I read something about an issue with the fuel filter, and something else about random voltage spikes shutting the engine down. Any truth to these? can anyone put me in the right direction? I've had this thing into 3 different places.
Thank you!

I did a you tube check on your car, lots of info of this problem came up.