I have just bought a 99 Seville STS and I have had it happen twice already where I have the vehicle in park for no more than five minutes or not even that long and it just turns off. Nothing pops up on the information screen saying anything is wrong either. Can anyone help me out? It doesn't do this all the time either.

 

It actually just did it at a stop light today not in park so I don't know what's going on....

 

Have you checked your battery?

 

Well I guess i should update this here, problem was that they had to adjust the rpms after they did that it wouldn't stall anymore.