As a new owner of a 2019 Bolt, I found this YouTube site WEBERAUTO from Weber University in Utah very informative. Done by a Professor, he has completely disassembled a new Bolt. The site is ongoing and done very well, no hand held phone cameras. If you ever wondered what's all going on under the hood; he explains it all in layman's terms. To my surprise, when you look under the hood, you do not see the drive motor. I got a lot to learn.