Product review (4 stars): Works, but this may not work for GE Model GLD5560L00SS depending on your installation
Works great for me, but a warning for some.
First off go ahead & order the impeller kit and drain pump adapter assembly (WD12X10189). I got just the sump & the impeller, and THEN found a pin hole leak in the adapter. The sump & adapter are made from the same material so they fail at similar times. If one goes, the other isn't far behind.
Since you've got your dishwasher apart go ahead & replace the impeller. It is a common fail point too. All three parts will cost $75-$90 total, but will save hours of more repair & clean-up.

WARNING!!
I have a GE dishwasher (GLD5560L00SS), and Amazon says this sump fits. It does fit, but this part is different than the part on the dishwasher.
The original has another 1" tube extending on the right (when looking at the picture). On my dishwasher this tube was plugged with an electronic sensor that wasn't connected to anything. My part was actually WD18X10008. Even the manual I found on SearsDirect was incorrect.

Make sure what connections your model is using. But this part will work if your dishwasher isn't using the tube on the right.
I noticed a few differences between the manuals & repair videos. This appliance model has had some obvious, but slight changes.