Table 1 shows one common service brakes related problems of the 2027 Chevrolet Bolt Ev.
| Problem Category | Number of Problems |
|---|---|
| Service Brakes problems |
This is in regard to the automatic emergency braking function in my new 2027 Chevrolet bolt. While driving, the emergency braking system suddenly activated the brakes. It was unanticipated, unnecessary, and violent to the extent my wife, in the passenger seat, later reported headache and neck pain. I did not report this to the dealer and it has not been inspected. Apparently, this is what the car is designed to do. I have managed to turn off this system but it defaults to "on" every time I turn the car off. There appears no permanent way to deactivate this system.
The brake pedal can easily become disconnected from the electronic brake booster behind the firewall. When this happens, it stops all driver aids. The safety issue is it can happen while driving, and if using adaptive cruise control, or gm super cruise, if one pedal driving is on, it can without warning substantially slow the car, and has the potential to cause an accident. Its not too far to think the dislodging can cause the boost arm to be placed in a position to prevent full brakeing either. I have not taken it in because it is a design flaw of the system I believe. From searching online, I found the assembly, and it lacks a locking pin in the pedal to the shaft as you can see in the service diagram attached. Speaking to someone at a gm dealer they verified the issue on another 2027 chevy bolt, but not reproducible on other gm vehicles with the same electronic brake boosting system.