I recently heard that Grand Central Station closes at 2am. Is that true? I had always thought it's always open.

As per Google Grand Central Terminal is open during the hours of 5 am to 2 am. The few hours that they are closed is for maintenance and whatnot.

But i doesnt meant that ur train would be till 2 am ... U have to confirm ur departure usually the las one leaves at 140 or 150 ..... Once i lost my train and have to stay all night long till 5 am .... Walking around .... Good luck

Yes

I believe they close at 2am and open again at 5:30 am