Starting with 2017 model year Volt, Driver Confidence Packages A and B were both available, not sure if both A and B were available on the 2016. This includes not only collision detection but collision avoidance/automatic braking. Starting in the May 2016 time frame 2017 Volts started to be available with optional Adaptive Cruise Control (ACC) (an option on the Premier Volt only), ACC requires A and B. ACC is a big deal for some, it is the reason I waited for and purchased a 2017 Volt instead of a 2016.
That comes standard with me in all cars
Jan 24, 2016 picked up my Gen 2... no problems whatsoever. Flawless.