Automatic Emergency Braking problems of the 2019 GMC Sierra 1500

On a normal trip to work the dash light lit up then gave me these warnings. Service esc, service trailer brake, brake system failure-62 mph top speed, steering assist reduced. Dashboard lights that were on, abs check engine, brake, traction control. When I tried to slow down the power assist was gone on the brakes, I had a little braking when I pushed the pedal all the way to the floor as hard as I could, when I went to turn the wheel was hard to turn. I have had no issues like this before. After I managed to stop and turn off then on the vehicle everything came back expect for a warning to service the trailer brakes and the check engine light was still on. It all cleared after a few more restarts. I got the truck to the dealer 4 days later and they said it was the battery going bad even though I was not having any problem starting the vehicle, I had them replace the battery. I am unsure if the problem is resolved, time will tell. What I am sure of is if my daughter had been driving the truck, she would not have had the strength to get the brakes to work or turn the wheel, she would have had a accident for sure.

I put my truck in break. Service mode to replace the brake pads. I began changing the pads and could not get the piston to retract all the way, I hooked uon a c clamp to retract the piston. In the event I moved the rotor to another spot and the brake service mode turned off and the piston extended. My fingers nearly got caught in the caliper. When put in brake service mode, it should not automatically extend when turning the rotor. Someone will get hurt bad at some point in a swrvice garage or at home when wirking on brakes.

Question #1- “service trailer brake system”-“steering assist is reduced drive with care”-brake system failure 43 mph top speed”-“service esc” question #2- I experienced a complete loss of braking ability, myself, a friend and, a coworker, as well as the properties around me where placed at risk. Question #3 not yet I am having towed to the dealer today. Question #4 not yet the vehicle will be towed to the dealer where I purchased it today. Question #5 not my knowledge I do not recall any warning lights.

What happened: the air bags failed to deploy during a crash. Question: what component or system failed or malfunctioned? answer: air bags, automatic emergency braking, forward collision warning. Question: is it available for inspection upon request? answer: yes question: how was your safety or the safety of others put at risk? answer: driver-side air bags failed to deploy upon a rear-end collision with the vehicle to my immediate front @ 40 mph. Question: has the problem been reproduced or confirmed by a dealer or independent service center? answer: no. It currently is at a repair facility as of this morning and it’s apparent that the air bags did not deploy. Question: has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? answer: no, and not to my knowledge since turning the vehicle into the repair facility this morning. Question: were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? answer: none. No previous warning lamps, messages, or symptoms. *note: I have dash cam video of the collision in my possession.

Were driving and vehicle repeatedly suddenly braked in the middle of interstate or highway without any warning. We are so traumatized, and scared of this vehicle. It has happened before. Dealership says there is nothing they can do. This could have caused our life. GMC should be held accountable.

I were driving at low speed and all 4 wheels locked causing the vehicle to suddenly stop without notice. I almost got rear ended. I had to put vehicle in park and turn off and turn back on to get it to move. Again it did the same thing stoping with brakes locking suddenly, almost causing an accident in middle of road. There was no warning at all.

I received a brake control module warning alert. The alert indicated my abs system was subject to failure and required a software patch. I see that the exact issue I had was subject to a recall of 463,000 similar year and model vehicles. Despite the identical issue, it being related to a failure of their software the GMC website and my dealer refused to cover my vehicle claiming it was not part of the recall.