[glenB]

FWIW, the 10 only operates in 8 gears around town.

Here's some reading

http://media.gm.com/media/us/en/gm/h...0speed-gm.html

http://www.caranddriver.com/flipbook...c-transmission

http://gmauthority.com/blog/2017/04/...180-mph-video/