Due to the track reconstruction at New York's Penn Station, Amtrak has switched 6 Empire Service trains (3 departures, 3 arrivals) to Grand Central Terminal from July 10 - September 1, 2017.
The affected trains are #'s 230, 233, 235, 236, 239, and 242.
There is more info from Amtrak at:
https://www.amtrak.com/servlet/Conte...=1251653727006