I have an 03 CTS and my car keeps stalling. My keys cranks but does not turn on. Sometimes when im at the light my car just stalls. I have changed the fuel pump, fuel pump filter, fuel pump relay. My battery is good and so is my alternator. My car has been to 2 mechanics and everyone is scratching their heads. My battery voltage meter runs frome 15.0 to 14 while I am driving. And the engine light does not turn on so no codes. I have heard it could be the crank sensor. Can anyone guide me to the right direction.
Thanks

 

I suggest to have car checked for codes, and post them. SES not on doesn't always mean no codes.Check throttle plate make sure it isn't carboned up. If problem is intermitent take to dealer. They should have Vehicle Data Recorder that can take "snap shot" of data when condition occurs. You will have to press a button when it happens, VDR will record data, then return to dealer for re-eval.As far crank sensor they do fail and will normally set code, if it causes car to stall.