There was an article that discussed this question
http://insideevs.com/exclusive-inside-the-chevrolet-bolt-with-its-chief-engineer-new-details/
It said, in part....
In addition to the Low drive setting, the Bolt has a Regen on Demand paddle on the steering wheel. So there are actually four different levels of regen with the level of deceleration getting stronger at each level below:
Drive mode (mildest regen <.2g’s)
Drive mode using Regen on Demand paddle
Low mode
Low mode plus using Regen on Demand paddle (strongest regen ~.3g’s)
http://insideevs.com/exclusive-inside-the-chevrolet-bolt-with-its-chief-engineer-new-details/
It said, in part....
In addition to the Low drive setting, the Bolt has a Regen on Demand paddle on the steering wheel. So there are actually four different levels of regen with the level of deceleration getting stronger at each level below:
Drive mode (mildest regen <.2g’s)
Drive mode using Regen on Demand paddle
Low mode
Low mode plus using Regen on Demand paddle (strongest regen ~.3g’s)