sounds like they added the pedestrian detection and/or signal light detection
Still no pedestrian braking or signal detection for the HDs. The “Plus” part of the FCW feature is just saying that it auto brakes in addition to visual warnings.
So maybe just semantics, but when I read the manual for the 2021 3500, I believe it did say it had pedestrian detection but maybe not. I have read so much waiting for my truck that I lose track of where I saw specific things. Maybe the HDs have pedestrian detection, but not pedestrian braking? Or maybe neither?