When the GM engineers were at my house yesterday trying to diagnose power problems, they instructed me to take the car to the dealer to get the most current software upgrades. I am presuming they are referring to the ones you mention here.I can confirm there are software updates available for a number of system modules for cars built prior to BU100954
These updates can be performed by your Volt dealer but are really only neccesary if very specific faults are being observed by the owner/s.
These include ANY of the following concerns,
Check Engine Light (MIL) or associated system warnings as a result of DTCs setting in any combination in the following modules:
Engine Control Module (ECM)- P0128 P0604 P06E4 P1133 P2181
Hybrid Powertrain Control Module 1 (HPCM1)- P07A3
Hybrid Powertrain Control Module 2 (HPCM2)- P0ABB P0604 P0D26 P0CD2 P0C4A
On-Board Battery Charger Control Module (OBCM)- P0D3E P0D3F P1F05
Plus ANY issues regarding operatonal concerns of the climate control system, (esp with respect to heated seats or fan blower functions)
*There will also be an update released very soon to remedy various Nav Radio issues resulting from a "resetting" condition
Many thanks goes out to early adopters of the Volt for their asisstance in identifying these issues and their patience in helping their dealer and Volt technical assistance in determining root causes and reach final resolutions.
There is no subsitute for "real-world" experience!
You do a great service.