If you have not already found the, great teardown videos of the bolt are
Professor Kelly has done an amazing job educating us all on the inner workings of the Bolt. See his youtube channel for battery pack and others.
As others have said, the Bolt has proven to be an incredibly reliable vehicle, don't trust me, see also consumer reports.
Over 100k miles is still unproven for most of us, but not GM testing or the Bolts used for Maven
no idea what they have racked up now, that was back in 2017, and soon
. Some Volts have very high mileage
, which bodes well for us.
Having now had mine for 20+ months and also having maintained my own vehicles most of my life, I would not personally be intimidated by maintaining a Bolt myself. The Bolt is built in typical GM fashion, comprised of replaceable modules, with most parts that will need to be replaced between 100k and 200k miles not likely being the EV powertrain but more likely tires and suspension components.
I would anticipate the used market showing greatest Bolt availability starting mid to late 2020 when they start to roll off lease. My very unscientific guestimate of those that purchased a Bolt is that they intend to keep it and not trade anytime soon...
Here is the TSB and service manual link
And here is the publically accessible portion of GM Techlink
I had lots of fun working on ICE vehicles over the years but I have to say having a vehicle that requires little to no service is even better, I now spend my time watching professor Kelly tear them apart and on this forum ;-)