2021 GMC YUKON Forward Collision Avoidance Automatic Emergency Braking Problems

Vehicle: 2021 GMC Denali Mileage: ~48,000 miles Purchase Price: $62,000 Issue: Airbags & crash sensors failed to deploy Complaint Text: I am filing a safety complaint regarding my 2021 GMC Denali. I was involved in a rear-end collision at approximately 45 mph, where I struck another vehicle straight on from behind. The impact was severe enough to total my vehicle, yet no airbags deployed, and no forward collision warning or crash sensor systems activated. This is especially concerning because this vehicle was previously involved in a front-end collision (not my fault) and underwent extensive repairs. I was assured all systems were repaired and functioning properly. Additionally, my vehicle had completed recall work related to safety systems prior to this crash. This is the second front-end crash involving this vehicle where airbags failed to deploy. Given the speed and severity of the impact, airbags should have deployed. The failure of these...

Font Camera failure. Front camera controls many "safety features" which fail without the camera. Vehicle under mileage warranty amount but not under time warranty ( 3 years ). Camera only covered under bumper to bumper.

On 4-5 occasions since purchasing a new 2021 GMC Yukon Denali the automatic breaking function has engaged for no reason, with no obstruction in the roadway. It has occurred at low speed (after disengaging break and starting to drive). Obviously, this is a major safety issue.

20221 GMC Yukon Denali Suddenly comes to a stop ,” it brakes hard “ It acts like when you are almost gonna hit someone and brakes engage so hard. Jerks everyone to the front !no other lights coming on or anything else! For now it’s been doing it at slow speed , really don’t wanna experience it at a high speed , pls help these vehicles are so expensive to be dealing with this . This is my wife and kids vehicle

2 different times I have been driving once at a high speed of 70 on the highway and then driving 15-20 miles an hour today my automatic braking engaged and threw me forward which is a very scary feeling. I have not taken it in for service for that as it had only happened once a few months ago and there have been no warning lamps indicating an issue.

I was driving on the interstate on a low speed and my SUV came to a complete stop with no notice. Nothing was in the road or close in front of me. Jerked me to the front and seat belt left a red spot on my neck from the seat belt, scared the crap out of me. I thought I was hit from behind. The is a hug safety concern that needs to be recalled and fixed immediately before it causes an accident.

I was involved in a vehicle accident on 10/6/2021 where my vehicle was stuck by an uninsured motorist driving recklessly on the interstate causing a total of 4 car collision. My vehicle was a a 2021 GMC YUKON SLT SUV, in which I was struck on rear drivers side quarter panel and again by another vehicle in the front bumper by another vehicle that struck in the rear bumper by the reckless driver. With my vehicle being struck by two vehicles I was shocked to learn the Onstar safety security features did not detect or contact me regarding the accident. It wasn’t until the wrecker driver arrived to pull my vehicle onto the tow truck that I received a diagnosis notification email from o star about my antilock braking system. Although I was wearing my seat belt, the impact of the collision was very shocking, my chest and neck struck...

I had just left the house driving through my neighborhood at about 35 MPH when for no reason the emergency braking engaged. The road was deserted, no other vehicles, pedestrians, dogs or objects in roadway. There was a momentary red dash alert, but I didn't have time to read it.

This new 2021 GMC Yukon Denali we purchased on June 2, 2021 has a very sophisticated controls system that includes a feature, entitled "Brake Assist," that is designed to detect "rapid brake pedal applications due to emergency braking situations and provides additional braking to activate the Antilock Brake System (ABS) if the brake pedal is not pushed hard enough to activate ABS normally." "Brake Assist disengages when the brake pedal is released." After I left the dealership (June 2nd), I noticed that the "Service Brake Assist" light had illuminated on the Driver Information Center (DIC). I pulled off the road to check the Owner's Manual, and then continued home trusting that no immediate hazard existed. I subsequently set up an appointment with the dealership for a checkup. A week later, the dealership downloaded a new software package from GMC. The Brake Assist light did not appear when the engine started,...

DRIVING APPROX. 62 MPH ON A HIGHWAY, WENT TO SLOW DOWN AND UNABLE TO BRAKE, UPON PUSHING DOWN ON THE BREAK THERE WAS RESISTANCE, AFTER PUMPING THE BREAKS MULTIPLE TIMES I WAS EVENTUALLY ABLE TO SLOW DOWN WITH A LOT OF FORCE. MESSAGES ON DASHBOARD READ "BRAKE SYSTEM FAILURE" "62 MAX SPEED ESC, SERVICE ESC, SERVICE TRAILER BREAK SYSTEM, AND FORWARD COLLISION SYSTEM UNAVAILABLE." ABS, ESC AND CHECK ENGINE LIGHT ALL ILLUMINATED ON DASH SCREEN.