Owners Manual
Cameron, I was able to find the manual for your dishwasher. There were a couple of versions of the GSD1000 with slight variations. What threw a real monkey wrench in the whole thing is there was also a GSD1000 modern dishwasher within the last 10 years or so.
The manual I found is for a model that has Rinse & Hold on the timer dial and not a cycle button. GE did silly things with cycle names. The manual I've included the link for had cycle buttons for PotScrubber. Normal Wash, and Energy Saver. GE simply renamed the major cycle buttons. The equivalent to your dishwasher would be Power Scrub, Heavy Soil, and Normal Wash. The only difference between China Crystal & Normal or Energy Saver was the shorter fills yielding the "aerated" softer wash.
I had a GSD1200 from 1987 with rapid advance timer. When the original PotScrubber III series was announced, the GSD1200 was the top of the line.
My version's cycles were labeled Potscrubber, Normal Wash, Light Wash, Energy Saver, China Crystal, and Rinse & Hold.
Earlier version were labeled PowerScrub, Heavy Wash, Normal Wash, Light Soil, China Crystal, and Rinse & Hold. The cycle name labels were changed, but the cycle sequences were the same. So the shennanigans of just relabeling cycle names allowed meeting Energy Star regulations at the time.
I'll let you know if I ever find the user manual for your exact version of GSD1000.
Bob
https://www.manualslib.com/manual/1141736/Ge-Gsd1000.html#manual