My GE side-by-side fridge was only making crushed ice, so I googled the problem and found the likely culprit was a failed solenoid. A little more searching and I found the part and video at AppliancePartsPros.com. The video alone was incentive for me to order the part there and then, it arrived a couple of days later, and the part was installed in about 30 minutes.
The video really helped, and the only problem I had was removing the pin that holds the arm to the plastic. I initially though it was an Allen screw, so went back and watched the entire video and realized the pin had to be driven out with a small hammer and suitable driver. Tapping that pin out was a little fiddly, and it helps to have a means to stabilize the part, with a hole underneath to allow the pin to come out. Once that as sorted we were back in business and a successful fix, which was celebrated with a drink with uncrushed ice! Thanks AppliancePartsPros.com and kudos on the super-helpful video!