What is your question?
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What is your question?
It will drive smooth like nothing wrong and just shut off then I put it in park it will start back up and drive as if it never happened and the service vehicle soon light will come on not the engine light

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I am having the same issue with my 09' STS last fall it began stalling while I was driving down the road. I lose all power (steering and brake lights, even hazards won't come on). It has been in the shop at a Cadillac dealer 5 times now for the same problem and it's still not fixed. It has progressed to a point that it will not reveal and when it finally does I don't make it 1000 feet before next shut off. The dealership has replaced a pump that "could be the problem" found loose and rubbing wired that have been fixed and the main cpu (1 of the 9 the car has) and once again I'm without a vehicle. I would really like some insight as to what this may be. Tired of the money pit.