The U34CH is a 3,600 hp (2,700 kW) passenger diesel locomotive built by General Electric between 1970 and 1973.

The 32 initial locomotives numbered 3351–3382, were built by GE for the New Jersey Department of Transportation (NJDOT) and operated by the Erie Lackawanna Railway with new Pullman Standard push-pull coaches.

The units were intended to replace locomotives in suburban commuter service out of Hoboken, New Jersey.

As New Jersey Transit received rebuilt former Penn Central GP40PH-2B from Conrail's Juniata shops during 1993–94, the fate of the U34CH was sealed.

The U34CHs were formally retired from passenger service in August 1994, at which time the United Railway Historical Society (URHS) ran a "Farewell to the U34CH" excursion.

Their current status is unclear, due to a privatization of the Mexican railroads leading to many older locomotives being scrapped.

In October 2013, the URHS began a fundraising effort to restore 3372 called "Project U-Boat.

"[2] The campaign had raised enough funds by March 2014, and later that year, the URHS began looking for bids to move the locomotive.

On October 29, Morristown & Erie Railway crews were sent to Passaic to rescue the U-Boat and remove it from NY&GL property.