2024 GMC Acadia

On April 11, 2024, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE24011 after receiving complaints concerning a loss of brake assist in 2023 MY Cadillac Lyriq vehicles. These complaints allege a hard brake pedal, followed by a “Brake System Failure” message at start up or while driving. GM shared records regarding several internal investigations for loss of brake assist due to alleged spindle fractures in the eBoost system. GM has stated that in the event of a spindle fracture, anti-lock brakes (ABS), stability control, and traction control remain functional until the vehicle comes to a complete stop. At this point, ABS, brake assist, stability control, and traction control functions are lost. The loss of these functions causes the vehicle to set one of three Diagnostic Trouble Codes (DTCs) based on failed performance criteria for the Electronic Brake Control Module (EBCM). These DTCs, in turn, activate several driver alerts: an audible chime, a visual “Service Brake System” message in the display, and multiple illuminated Malfunction Indicator Lights (MILs) for the ABS, Traction Control, and Brakes informing the driver of loss of functionality. The vehicle speed will also be limited to 70 KPH (43 MPH). Since opening PE24011, ODI has continued to receive reports of loss of brake assist. Some of these reports describe symptoms inconsistent with GM’s description of a spindle failure. These reports allege an immediate loss of brake assist functionality as opposed to the loss occurring after the vehicle comes to a complete stop. The sudden loss of brake assist during a braking event could result in extended braking distance, which increases the risk of a crash or injury. ODI believes further analysis is necessary to assess the potential for failures in GM’s eBoost system to resulting in safety-related outcomes. At this time, ODI is aware of the following vehicles that are equipped with this eBoost system: 2023-2026 MY Cadillac Lyriq, Chevrolet Colorado, and GMC Canyon; 2024-2026 MY Buick Enclave, Envision; Chevrolet Blazer EV, Equinox EV, Traverse; Cruise Origin; and GMC Acadia; 2025-2026 MY Cadillac Celestiq and Optiq. ODI is also aware of 2024-2026 MY Acura ZDX and 2024-2026 MY Honda Prologue vehicles that were built with this system. The Acura and Honda vehicles were manufactured by GM in a joint venture with Honda, and will be included in the Engineering Analysis as peer vehicles. ODI is opening this Engineering Analysis to further assess the safety-related consequences of a failed eBoost system. In addition, ODI is expanding the scope of the investigation to encompass all GM vehicles that share this eBoost system. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

On [xxx], I remote-started my 2024 GMC Acadia. With the driver-side door and rear passenger-side door left completely open, I stepped inside the vehicle, placed my foot firmly on the brake pedal, and pressed the engine Push-to-Start button to transition the vehicle from remote-start mode to operational drive mode. Immediately after pressing the button, I took my foot off the brake pedal and exited the vehicle. A second later as I was walking toward the back of my vehicle, without any driver intervention or manual gear selection, the electronic shift-by-wire transmission uncommandedly engaged completely into REVERSE on its own. The vehicle began actively driving backward. Despite the driver-side door being wide open and no driver being present in the seat or belted, and the rear passenger side door open, the vehicle's electronic 'Auto-Park' system and automated emergency braking failsafes completely failed to engage or shift the vehicle back into Park to prevent a rollaway. The uncommanded vehicle movement forced me to chase after the moving vehicle to regain control, posing an imminent and severe risk of property damage, catastrophic bodily injury, or death. The rear open door got stuck on our hose container and fire pit on the side of the house, and ripped the door off the hinges. The vehicle has been towed to Matthews GMC in Vestal, NY for diagnostic evaluation. GM Corporate Case #[XXX] has been opened. I am filing this complaint because an uncommanded transmission engagement combined with a total failure of the vehicle's electronic safety override systems represents a critical, life-threatening manufacturing and software defect that requires immediate investigation. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11775425

Incident

Nov 2, 2026

On September 26th, 2026 I got a random notification about needing to get my rear left turn signal checked out as it still functions but blinks rapidly. Today, September 28th, 2026, I visited my local dealership for the issue and was informed that they had received a bulletin regarding the concern but that instead of covering the defect tied to a "software anomaly", I was told it would be around $600 to replace. I feel this is a strong enough safety issue that should be considered for a recall as this is a widespread problem and should be covered by GM.

NHTSA ID

11767507

Incident

Sep 26, 2026

Well, let’s try this again. The first try disappeared. The rear hatch seal on the vehicle has identical spots on both sides of the hatch that are mashed flat. I think this is being caused by the flat spots on the hatch itself. The vehicle is a total body and engine redesign. The flat spots allow for dust intrusion into the cabin all the way to the front of the cabin. We live on a gravel road, so we can see the intrusion, albeit it took a while to figure out where it was coming from. People in town won’t know. I videoed the seal and hatch the day before it was replaced by the dealership. My fear is that someone on a trip may get into trouble, because you know if dust can get in, carbon monoxide can as well. I’ll include the video. Thank you for reading.

NHTSA ID

11766577

Incident

Sep 17, 2026

Today, on [XXX] outside of Sapulpa Oklahoma, while in the inside lane of three southbound lanes, cruise control on at 80mph. The car suddenly reduced power, air conditioning stopped, assisted power brakes stopped working, gauge cluster full of flashing warnings. Pulled to the right shoulder, stopped with difficulty. Had to pump and stand on brakes to get stopped. Shut off engine, then restated and everything stated working again. Scary situation in heavy traffic. Lucky to be alive!! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11766232

Incident

Sep 22, 2026

When backing into my driveway the brakes failed. I was nosing the car across the street towards the neighbors driveway so I could put the car in reverse and back it into the driveway. I applied the brakes while traveling at about 3-4mph when the brakes had little resistance and went straight to the floor and the vehicle continued moving forward. Attempted to apply brakes again and the same result. Ended up hitting the neighbors parked car in their driveway. Luckily it was a very low rate of speed so there was minimal damage and nobody was hurt. There were no warning lights present before, during, or after the incident. The vehicle got towed to a local GMC dealership who could not replicate the issue. Insurance is still looking into the issue.

NHTSA ID

11765053

Incident

Sep 11, 2026

When backing into my driveway the brakes failed. I was nosing the car across the street towards the neighbors driveway so I could put the car in reverse and back it into the driveway. I applied the brakes while traveling at about 3-4mph when the brakes had little resistance and went straight to the floor and the vehicle continued moving forward. Attempted to apply brakes again and the same result. Ended up hitting the neighbors parked car in their driveway. Luckily it was a very low rate of speed so there was minimal damage and nobody was hurt. There were no warning lights present before, during, or after the incident. The vehicle got towed to a local GMC dealership who could not replicate the issue. Insurance is still looking into the issue.

NHTSA ID

11765052

Incident

Sep 11, 2026

The contact owns a 2024 GMC Acadia. The contact stated that after an oil change, while starting the vehicle, the steering wheel became inoperable. The contact became aware that the top of the steering wheel was cracked and had popped out of place. The contact stated that while driving, the failure caused a cut on the hand. The vehicle was taken to the dealer, where the failure was confirmed. The contact was informed that the steering wheel needed to be replaced. The dealer referred the contact to the manufacturer for assistance, and a case was opened. The contact believed the failure might be related to the leather on the steering wheel, which had deteriorated due the changes in the weather. The contact was concerned that the damaged steering wheel posed a safety risk while operating the vehicle. The failure mileage was approximately 47,000

NHTSA ID

11764946

Incident

Aug 12, 2026

Mileage

47,000 mi

2024 GMC Acadia grounded at dealership for 3+ weeks due to unavailable driver seat belt buckle (Part 26522477), rendering a brand-new vehicle legally un-driveable due to primary restraint part constraints. The buckle will not latch, causing the seat belt to be rendered inoperable. The problem was reproduced by the dealership, and the replacement part is backordered.

NHTSA ID

11750108

Incident

Jun 23, 2026

This Preliminary Information provides diagnostic tips and guidance for situations where key fobs cannot be learned or programmed successfully.

This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3

This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display

This Preliminary Information is to inform technicians to not replace any parts at this time and to use the work around provided. When a fix is available, this PI will be updated to a bulletin.

This Preliminary information communicates an issue with the virtual garage door opener not programming to a garage opener and to replace the opener with a new updated part.

• More responsive map controls when switching views • Trailer Theft Alert settings are saved between drives • More reliable access to on-screen controls for temperature, fan speed, and heated seats • Improvements that help prevent the center display from freezing or unexpectedly losing audio • Improvements to the infotainment system from Android update. This Android update removes Alexa Built-in (if supported). Google Assistant will remain available. • Fixes to improve responsiveness for the center display, driver display, and camera. • Fixes for Apple CarPlay functionality and connectivity (if supported). • Fixes to help ensure proper functionality for Bluetooth. • Improvements to audio system performance.