Pumping out or leaking out?
There are various rubber connectors underneath and they can perish and leak. There is a trick. slide a piece of paper under it. Switch on and after a minute, pull the paper out. It will give you a rough idea where the leak is, front, back, left or right. Then pull the machine out, and tilt it safely against the wall, get someone to hold it and look with a flashlight for the area where the wet patch on the paper was.
Parts
https://www.google.com/search?q=ge+gtup270em1ww+parts
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