2023 CHEVROLET TRAVERSE Forward Collision Avoidance Automatic Emergency Braking Problems

While practicing parallel parking in the vehicle for about 1 hour, upon leaving the parking lot, there was a message that popped up on the dashboard reading, “SERVICE BRAKE ASSIST”. When driving the vehicle out the parking lot, the brakes were hard when pressing and the vehicle took a while to brake. I found myself braking at a far distance in order to stop the car at the nearest stop light. I turned my emergency lights and drove carefully home, since the engine light came on, which I parked and turned off the car. The next day, I turn on the vehicle and the engine light is still on, I take it to the local Auto Zone for a code, code P0556 is showing BRAKE BOOSTER PRESSURE SENSOR. I then call the dealership, they tow the vehicle and upon arrival they run diagnostics and text me the following message: “...

Lately this car has been signalling , to brake sooner because a vehicle is near but there is no vehicle around. While driving today we pulled out of a parking lot and entered main road the car stopped and it felt like a vehicle slammed and hit the rear end. My husband is assuming transmission went out. Our traverse wouldnt accurate over 16 mph. (While driving) very dangerous!!!!