The newer update adds improvements to the range estimation display that were not present in the original update for 2017 Bolts detailed in my article last week:I already had the earlier update done, but just received a next-day letter via FEDEX that I need to go back to dealer for another update for #18125, so I guess they found a glitch in the update somewhere. Will have to schedule another dealer visit soon.
https://electricrevs.com/2018/05/10/gm-releases-new-round-of-updates-for-all-bolt-evs/
