What 55 owners told NHTSA about the 2024 GMC Acadia Denali

1. The electrical system and driver-assistance/safety features malfunctioned, including intermittent power loss and dashboard system failures. The vehicle is available for inspection upon request. 2. The malfunction caused the vehicle to lose power to the braking system while driving, which created a risk of collision. Essential safety features such as power steering, brakes, and warning systems were impacted, putting both myself and other drivers at risk. 3. Yes. The issue has been reproduced and documented by the dealership during multiple service visits and reported to GM customer service. However, the safety claim was denied by GM and I have been advised to continue to drive this unsafe vehicle. 4. The vehicle has been inspected by the authorized dealership and GMC technicians. It has not been inspected by police or insurance representatives at this time. 5. Yes. Warning messages appeared on the dashboard, including system errors and power failure alerts. These issues first appeared around 20,000 miles, and have recurred intermittently since then. I have communicated with the dealership where the car was purchased and GM corporate requesting replacement with a safe and reliable vehicle. To date, I have not received a satisfactory resolution. I have researched and found that other 2024–2025 GMC Acadia owners are experiencing the same issue. This vehicle is unsafe to operate until GM identifies and resolves the defect. Losing control of the brakes constitutes a catastrophic safety failure that makes this vehicle unfit for road use. Immediate investigation and corrective action are necessary to prevent potential accidents or injuries.

NHTSA ODI 11691576

My vehicle only has 12,000 miles and it’s a 2024 and the brakes are constantly squeaking. I’ve reported this multiple times at my dealership and they are stating “this is normal and because of the new heavier materials there is not a fix for this.” I’m really concerned about this as it’s a safety issue. This car is also too new to be having this type of issue. I’m also apart of a owners forum and several owners are having the same issue. For the report today I’m putting the most recent date but as stated I have reported this several times with my local dealership Group 1 GMC here in Houston, Texas.

NHTSA ODI 11690933

No traffic collision. Preemptive report. Headrest positioned so far forward that head is forced into a downward position. Unable to comfortably maintain eye contact with the road in this position (photo attached). Only remedy is to have headrest positioned so far down that it would cause decapitation in a collision. I was not aware of the decapitation risk when purchasing the vehicle. GM initially stated the dealership should have remedies in the form of alternate parts to be installed at the dealership. Dealership stated that is not the case and they do not have any resolution available.

NHTSA ODI 11686746

when backing up brakes abruptly apply themselves for no reason at all. This happens all the time the dealer says there is no problem with my vehicle, but the rear breaking abruptly keeps on applying.

NHTSA ODI 11685470

The contact owns a 2024 GMC Acadia. The contact stated that upon starting the vehicle, the instrument panel remained blank. There was no warning light illuminated. The vehicle was taken to a dealer to be diagnosed; however, the contact was informed that the failure could not be duplicated, and no fault was found with the vehicle. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 200.

NHTSA ODI 11680471

While 2 hours from home driving down the interstate with a full vehicle, the vehicle alarmed and the screen notified "No Oil Pressure, Turn Car Off Now". I pulled over immediately and we had to sit on the edge of the interstate for 45 minutes - a safety hazard for us and the surrounding traffic. The vehicle was towed to the nearest GM dealer, where they assessed the vehicle and advised that this is a known issue for 2024 and 2025 GMC Acadias and Traverses. The vehicle failed to move oil and the engine was seized - a significant safety hazard. After a month, GM has informed us that zero replacement engines are available in the world and there is no timeline for replacement or repair and the vehicle is unusable.

NHTSA ODI 11680136

When backing up and nothing behind car abruptly applies brakes no alerts. This has occurred on multiple occasions and is very scary. This started first week of ownership took to the dealer and was told GM is aware of the issue but no repair available at the time. the car is a year old now and problem is still present I have had to disable the braking feature. The backing emergency braking is a safety feature so pedestrians / children don’t get run over.

NHTSA ODI 11677349

Rear driver's side brake light/turn signal is out. This is the second time in under a year. Local GMC dealer is not able to replace it within a reasonable amount of time causing a safety issue. This is a well known issue to GMC which is why the part is on back order. No other dealers in my area have the part in stock.

NHTSA ODI 11675120

Leaking transmission fluid- transmission fluid all over the underbody of my car. No reason to be leaking. Can’t find where it’s coming from. Every time I park than move to leave there is a puddle of transmission fluid.

NHTSA ODI 11670630

The contact owns a 2024 GMC Acadia. The contact stated that while driving at an undisclosed speed, the infotainment touch screen failed to display pertinent vehicle safety information. After restarting the vehicle, the vehicle returned to normal functionality, but the failure became a regular occurrence. No warning lights were illuminated. The vehicle was taken to the dealer, who was unable to determine the cause of the failure. The contact was informed that the manufacturer was aware of the issue and was working on providing a fix. The vehicle was not repaired. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 1,000.

NHTSA ODI 11666038

I am filing a complaint about my 2024 GMC Acadia AT4, leased brand new from Frank's GMC in August 2024, now with a little over 8,000 miles. The brake pads are worn to 35% life, far below the expected 30,000-70,000 miles, with loud squealing, fluid leakage, and odors. This poses a severe safety risk to my family and others, as compromised brakes could fail. In October 2024, before my 3,000-mile oil change, I reported brake concerns to Frank’s GMC service manager, Javier, who advised waiting. After the November 2024 oil change and tire rotation, only three months after obtaining my vehicle, Javier claimed no issues, despite my prior warnings. The problems worsened, with squealing, leakage, and odors persisting. My March 19, 2025, service appointment was delayed, calls ignored, and follow-ups never occurred. Sales manager Khaled stated that owner Frank confronted Javier about avoiding service issues, yet no action was taken. I contacted ten GMC service departments in PA, CT, and MD; they reported similar AT4 brake issues, some citing total brake failure. I spoke with GM corporate supervisors, who referred me back to the dealer. Frank’s GMC inspections overlooked my concerns. A local police department safety inspection unit confirmed the issues, but no manufacturer or insurance inspections occurred. The vehicle is available for inspection. I urge NHTSA to investigate this premature brake failure and ensure the 2024 Acadia AT4’s safety. The email screenshot I included was sent in April. I contacted the same GMC dealerships that previously reported no issues to check for updates, and they confirmed a change. All of them now report the same problem with brake pads and/or brake failure. This issue is covered under warranty and should be replaced without issue, but dealers are not complying. If overlooked, this could become a national concern

NHTSA ODI 11660978

The contact owns a 2024 GMC Acadia. The contact stated there was an abnormal squeaking sound coming from the vehicle while depressing the brake pedal. There was no warning light illuminated. The vehicle was taken to a dealer and the brake pads were replaced; however, the failure returned several days later after the repair. In addition, the contact stated that transmission fluid was leaking from the vehicle. The contact also stated that both taillights had failed to operate as needed and the message "Check Left Rear Turn Lamp" and "Check Right Rear Turn Lamp" messages were displayed a day apart. The vehicle was taken back to the dealer where the mechanic confirmed that there was a transmission fluid leak due to defective bolts. The dealer also replaced the rear taillights. The contact was also informed that there were no issues with the brakes, even though there was a noise coming from the vehicle. The manufacturer was not notified of the failure. The vehicle was not repaired and remained with the dealer. The failure mileage was approximately 1,000.

NHTSA ODI 11658505

The Vehicles engine siezed at 6,400 miles leaving us stranded on the side of the freeway for 3 hours and GMC is trying to PIN the blame elsewhere. Car has been in the shop for 3 weeks and they are unsure if it will be covered by warranty. The only thing done to the car was an oil change performed at a GMC dealer.

NHTSA ODI 11658267

Leaking transmission fluid

NHTSA ODI 11652965

My vehicle is 3 months old with 4650 miles. I was driving on the turnpike and without notice a warning on the dash advised that there was no oil pressure and to pull over. I had the vehicle towed to a dealer out of state since we were 3 hours from home. The dealer called today to advised the car needed a new engine. I asked what was the route cause and they advise the GM did not require the engine to be stripped to find one.

NHTSA ODI 11643383

When pressing brakes to start the car the pedal goes all the way to the floor with little or no resistance. It has happened three times in 3 months. Took it to GM dealer after the first two incidents and they did a software update. Took it in again after the third incident and they did nothing.

NHTSA ODI 11642985

While using the super cruise system I am experiencing unexpected braking of the car as it thinks it is about to rear end the vehicle in the right lane it is passing in the left lane. This happened multiple times on a recent highway drive. I am worried I am going to be rear ended by cars following me or the victim of road rage as it appears to other drivers I am brake checking them while in the passing lane. Additionally the adaptive cruise control and super cruise seem to fail to detect the vehicle immediately in front of me and fails to slow down with adaptive cruise control or attempt to change lanes when using super cruise. In both instances I have to manually brake and or change lanes to avoid a rear end collision. While manually driving the vehicle I am also receiving collision alerts when overtaking cars in the right lane while I am passing them in the left. The super cruise was able to identify cars entering the highway from on ramps multiple times and would auto lane change correctly. This leads me to believe the sensors are working but software may not be utilizing correct distance analysis when slamming on brakes as it passes a vehicle. I am scheduling a dealer service call, but feel like they will tell me there are no computer errors. There are no recalls on file. The on-star monitoring is reporting no errors. Seems like a design flaw, logic error that will require a software update.

NHTSA ODI 11640165

This 2024 GMC Acadia will not back up safely on a rainy day. when moving backward, when it raining the emergency braking continually engage, approximately every two feet. I took it to GM dealer service center, it did the same with them. However, they can't correct the problem and GM does not have a fix. Also others vehicle like this one are experiencing the same problem. This has been an ongoing problem since July 5, 2024 in rainy weather. I called GM customer service and have gotten no result. I don't know what to do. can you all help us (Please). Thank you all so very much.

NHTSA ODI 11631937

When the vehicle is in reverse and you are backing the emergency brake suddenly comes on practically giving you whiplash. This happens randomly and without any obstruction or reason for the emergency brake to come on. It has happened many times. This morning it slammed the emergency brake on 4 times in a row I didn't think I was going to be able to back up as it kept kicking the emergency brake on. Based on what I have seen on the internet many 2024 GMC Acadia owners are having similar problems. GM needs to fix this!

NHTSA ODI 11629852

I bought a brand new GMC Acadia at Thompson GMC in Raleigh NC. From day 1 I have been having a issue with the tire pressure sensors disconnecting from the system. Thompson GMC was giving me attitude for bringing it back so many times so I brought it to Leith GMC in Wendell NC for diagnoses. Both shops referred to GM TSB (Technical Service Bulletin) PIT6188 which they both tried the reprogramming with no such luck. I was advised to wait for GM to come up with a fix and refused a loaner for the time unless I paid (GM customer care confirmed I would have to pay up front for a loaner). It is now 6 months later and I am still driving a vehicle where lights still come up on the dashboard and no fix. I get no where with the dealerships and GM customer care (case # 9-14086984106) advises me I have to keep bringing it to the dealership. No one can give me a update on when this will be fixed and I am constantly getting a run around. Please help.

NHTSA ODI 11629271

On our drive home from Colorado back to Wyoming. Our 2024 GMC Acadia AT4 had 3,076 miles on the SUV. No problems leading up to this point. Has we crossed the Wyoming boarder emergency light comes off shut vehicle off immediately. Oil pressure low. I pulled over on the side of the road called OnStar for a tow truck. This all took place [XXX] on Sunday. Dealership says the oil pumped failed. GMC needs to issue out a recall for this. I see other people out there deal with the same issue online. It really sucks I put down nice down payment for our family vehicle. Then this happens. We are down a SUV now, I have to pay the taxes on the car $3,239.40 and still making a payment on a car that I can’t drive. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11628078

I was driving and making a left turn at a traffic light when all of a sudden, every light lit up on my dashboard. Then the dashboard turned completely black along with the radio screen. When the dashboard went black, I tried to stop by hitting the brakes to pull over. The brake pedal went all the way to the floor, and I had zero brakes. I was able to coast to a dirt shoulder where the vehicle stopped due to friction and gravity. The brakes never worked to aid in stopping the motion of my vehicle. I had my vehicle towed immediately to the dealership where I bought it.

NHTSA ODI 11627973

THE SUPER CRUISE RANDOMLY KICKS OUT SOMETIMES IN THE MIDDLE OF A LANE CHANGE AND HAS EVEN KICKED OUT GOING OVER A HILL AND SENT THE CAR INTO THE OTHER LANE OF ON COMING TRAFFIC ITS HAS BEEN TO THE DEALER 3 TIMES IN THE FIRST 3 MONTHS OF OWNERSHIP FOR A TOTAL OF 18 DAYS IN THE SHOP GM SAYS THERE IS NO FIX AT THIS TIME. THIS HAS HAPPENED NUMEROUS TIMES

NHTSA ODI 11624805

GMC told me I needed to contact you regarding my third row seats not going down flat. The headrest will not flip forward causing me not to be able to use my vehicle as intended.

NHTSA ODI 11617678

The automatic braking system activates when there is no danger of collision or impact. During heavy rain, backing out of a parking space, with no hazard activating the emergency braking system near your vehicle, the emergency braking system will activate every 2-3 feet driven- sometimes occurring 6-8 times when trying to back out of space. This is a safety hazard because you’re left sitting in a roadway with no control over vehicle. Your chances of being hit by oncoming traffic, because your vehicle stops itself over and over, is high. Not only is the automatic braking jarring, you have to sit in oncoming traffic while the emergency parking brake releases. The emergency braking system will also activate without cause when backing down a hill, even on a sunny and clear day. This poses a danger when trying to parallel park, on a hill, in busy traffic. Have not reported to service center or manufacturer. Seems to be a system sensitivity issue that is a non serviceable issue. Problem occurred when vehicle under 1,000 miles and continues at 5,000 miles.

NHTSA ODI 11617622