While driving on the highway at approximately 60MPH, both display screens went completely blank. The A/C stopped working and radio speakers also stopped working. After about 30 seconds, the system had reset and came back on as if it was the start up sequence. I could not tell if it affected steering/braking since I was on a relatively straight road and light traffic but it was highly disconcerting that all speed/vehicle information went blank. If this had happened in denser traffic and the steering/brakes also affected, this could have caused a crash. As it was, I did not have any correlation to the current speed of the vehicle except for the previous reading. The onstar system shows no malfunctions, and there have not been any additional issues or warnings from the car before or since. The vehicle has not been looked at by manufacturer/dealership or any other entity.

- Tacoma, WA, USA

I had previously activated ACC to use on the highway with the speed set at 65mph. After getting off and driving into a parking lot I accidentally bumped the resume toggle on the steering wheel and the car started to accelerate requiring me to intervene. Luckily there were no vehicles or pedestrians in front of me at the time so I was able to regain control. The owners manual has this information. "To begin using ACC again, press +RES up briefly. If the vehicle is moving more than 5 km/h (3 mph), it returns to the previous set speed." 3 mph activation speed seems problematic for low speed situations described above.

- Bloomfield Hills, MI, USA