2000 bonnevile SSEI stalling when dead cold

Hi...have an issue when car is dead cold..... today is the first day this fall it has happened.... it will start right up.and stall immediately.. unless you have your foot on the gas a very little... it will continue to do this until warmed up then it is fine..... this happened last winter but not all the time.... has had no issue all spring and summer.... what can this be? it throws not codes...