2003 caddy CTS. Engine stalls out when car is moving. will not restart (battery cranks but engine will not catch) About a half hour later engine restarts and runs for about 4-5 minutes then stalls out agoain.

This may not be helpful but it seems the disappearing symptom syndrome is still alive and well at the garage and the doctor's office.

I had a blown headgasket i fixed that problem they said i needed a02 secnor haven't replaced that could that be the reason it's stalling also i unhooked the negative battery cable and the car died right out could that be the problem

Could that alternator be the reason my car is dieing cause i unhooked the cable. The car went dead

Did you try the crank sensor. When thr car dies out and you crank it and does the rpm needle move at all or bounce up and downif it does not move at all it's the crank sensor plus crank sensor codes never come up on the scanner