No AFAIK the brake light do not go on when decelerating in L (Had my wife follow me to check). Only when brake pedal is actually depress, or in the case of my 2018 the paddle is used.Hello, all, new Volt owner here.
When driving in L, and letting off the acceleration to slow the car down- do the brake lights activate?
Having been rear ended in a bad accident in the past, I'm a bit more hypersensitive to the possibility.
Slowing down as much as the Volt can without using the brake pedal has me worried about catching other drivers off guard if there's no indication.
FYI you did not put model year in your post.