You might be able to see the versions (calibrations) here. But you’d need GDS2 in order to determine the part numbers.Does anyone know if the update list is available before subscribing?
Would be nice to be able to check changelogs to know if there's an update available and whether it is important or not.
As for change logs, GM only provides basic info. If you had access to the online service manuals you could probably determine what problems are corrected by a calibration, in a roundabout way.
I wouldn’t suggest doing any of this just for fun. I originally got the VCX Nano and subscribed to SPS so I could reprogram HPCM2 in my Volt to clear the errors associated with a bad coolant level sensor. I subscribed to SPS again yesterday to fix the recall issue on my Spark EV. But, I wouldn’t randomly subscribe and update the calibrations. There is always a small chance the the reflash will fail and brick one of the computers.