I have a 2001 Buick Park Avenue. What could make car cut off while driving? on 2001 Buick Park Avenue

Changed fuel pump & filter, fuel pump relay, checked fuses, crank senser , battery and none of those seems to be the problem. My security light also would come on while car was being driven. Now car wont crank at all. Fuel pump will not come on when you turn ignition switch.

Security light flashing while cranking?
2 more answers
Look in to your cam shaft positioning syncer I was haven the same
Problem out of mine till I changed it and it runs like a champ now
Good luck
Check and see if it's your mass air flow sensor.. unplug the connection to the sensor and run the car -if no stalling - then you found the problem..