my 2001 monte carlo ss starts up then cuts off on 2001 Chevrolet Monte Carlo

sometimes it will start right up other times it will start up and cut off, i notice that if i give it a little gas and try to start it up it will start right up, it has been in the shop several times for this problem i was told i don't need a battery , fule pump, alternator, starter and etc i recently got a tune up but it still sometimes doesnt start right up please help me

Asked by for the 2001 Chevrolet Monte Carlo
poss idle air control valve. do you have any eng codes?