so i have had this car 2 weeks or so and this has happened twice.
ill just be sitting there at a light or something car running perfectly fine and then outa no where it stalls out. turn the key and like nothing ever happened it starts right up. drive away and its fine no lights engines not running rough. i dont even know where to start. 2003 monte ss 104k
thanks

 

Start with your throttle body. Could be the MAF sensor or the IAC sensor.

 

My car did the same thing. It ended being a crank position sensor.

 

by this you mean replacing the throttle body?
im not must of a mechanic so forgive me.