I replaced the pump and motor assembly. I also proactively replaced the fill hose while I had the dishwasher out since it was decades old.
GE now only sells a generic kit. There were about 7 different sets of directions for different groups of models, and myriad adapters and other parts to support all of them. I wish GE had provided a way of looking up which instructions to use based on model # as that would have saved me a lot of trouble sorting out the instructions, but I didn't find one. But it all worked out in the end and was well worth the effort since they don't seem to make dishwashers like they used to.
AppliancePartsPros service was outstanding - I ordered the parts in the morning and received the shipping notice and tracking number by lunch!