NHTSA Complaint #11586915 — 2013 CHEVROLET VOLT

This report is in general for EV batteries and low propulsion, BMW also. When system moves to low propulsion the break lights do not eliminate so the vehicle slows very fast as if it is breaking but no break lights turn on, this creates a risk for other drivers, this occurs on steep mountain climbs when mountain mode was not engaged. What I want to happen is when low propulsion mode engages the break lights come on so that other drives can keep safe distance as I pull to the side for battery to recharge. This does not happen that often but when it does occur it creates a scary situation. A electric BMW also did this today. Please request a break light adaption for future EV batteries/Gas Powered vehicles. Keep in mind this is generally for electric cars that have a backup gas engine that powers after battery is depleted, they most often have issues on steep mountain climbs at freeway speeds and or in some cases as I witnessed today when behind a BMW cars slowing very quickly without alarms to other drivers. If the system can generate a low propulsion error warning drivers it can turn the break lights on also in if software is coded correctly. System should turn on break lights when this occurs for BMW and or other electric cars