This electric car has regenerative braking. besides being in the regular braking, there is a pure regenerative braking paddle on the steering wheel. but when you use this brake, the brake lights to not turn on. this is a major hazard as i use this brake all the time and cars behind me do not know i am braking and have almost rear ended me. chevy dealer says that is the way it is designed and is functioning perfectly. why has this been approved to design a braking system without any warning lights? what can be done about this?