Automatic Emergency Braking problems of the 2024 GMC Sierra 1500

“service driver assist system” message appears every time I turn on my truck. Vehicle would randomly break when driving at slow speeds and show the forward collision alert even if no objects/ car are approaching or being approached. I am concerned about my safety because those sudden hard-breaks could cause an accident.

My truck braked for a vehicle that was parked on the side of the road. This vehicle was not in my lane or hazardous in any way. I was traveling at highway speed 55 mph and truck braked to 30 mph approximately with no pre warning this has not happened before or after. The truck has about 26k on it.

I was traveling on the interstate, going a little over 70 mph as I was passing a tractor and trailer. There were no other vehicles in front of me. Suddenly the truck jerked like the breaks were being applied and my speed was quickly reduced to around 60 mph. The heads up display showed a crash alert orange symbol. I pushed the gas to try to get back up to speed but the truck would not accelerate and the speed kept dropping. I pulled over to the berm and came to a stop. There was a message on the message center but it went away before I could read it with everything else happening. I put the truck in park and waited a minute then I pulled back out and was able to get the truck back up to speed and home. I plan to contact my dealer tomorrow. The ruck was involved in an accident that damaged the front in earlier this year so I believe some or all of those sensors have been replaced. This is the first issue we’ve had since purchase. If there would have been a vehicle following behind me, the rapid breaking/deceleration could have caused an accident. Also the inability for me to regain my speed when traveling on an interstate was a danger to myself and others.

Twice in the past month +. On [xxx] my wife and I were on our way to a family wedding and I was driving approx 75 mph on [xxx]. I don't recall if I had cruise control on or not as I rarely use it. There was no vehicle was in front of me for hundreds of yards yet all of a sudden the vehicle started to brake very hard. I accelerated as I did not know what was going on and I had a car in back of me that started to gain. Then last Friday ([xxx}) with my wife following me in her car on [xxx] through ellicott city MD I was traveling at approx 25-30 mph through a very small historic town when all of a sudden the same [xxx] thing happened. Def no cc on . When we got to our destination I asked my wife if she saw my brakes come on suddenly?. She replied yes and said she saw the truck dip hard. I told her the brakes did it again. She said I should call the dealer. I did not as they are useless! then the electronics. On star has a catalog of my complaints. The radio selections I make just disappear from the screen: apple car play disappears from the touch screen and just goes dark. I have to stop the truck. . (per on-star) open the door. . Get out. . Lock it. . Wait 2 minutes. . Get back in . . Restart the truck, and this re-sets the computers(s). Ridiculous! I do not have sirius but the radio goes dark often for about 2-3 seconds. , then comes back on. I was told it is my I-phone is causing this. [xxx]! what does my phone have to do with am/fm radio?? I was told by GMC there is a patch to update the software. Koons GMC told me there was no such patch nor recall. I paid nearly $80,000 for this piece of [xxx]! information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Truck thinks I’m about to run into something and slams on its brakes. Last time it sent my sister to the hospital to get 6 staples in her head. Digital cluster goes on and off as well as the infotainment center. Transmission bangs and shifts horribly. 900 miles on the truck with a check engine light and transmission warning.