2025 GMC Acadia

Since delivery, my 2025 GMC Acadia AT4 has had severe wind noise from the driver's side window at highway speeds. The noise sounds like fingernails on a chalkboard and at times as though the window may shatter. I have taken it to the dealership 4 times with no resolution. I provided video clearly capturing the noise and was still told they could not hear it. I have confirmed the dealer road tests the vehicle in morning traffic at low speeds — where the noise cannot occur. It only happens at highway speeds. Their "cannot duplicate" finding is the result of inadequate testing, not the absence of a defect. After sitting for approximately 7 days, condensation builds up inside the cabin, indicating the driver's side window seal is improperly installed. I reported this to the dealer as well with no fix. After 4 visits, dismissed video evidence, and improper test procedures, the defect remains unrepaired. I request NHTSA investigate this as a potential widespread issue on 2025 GMC Acadia vehicles.

NHTSA ID

11755203

Incident

Oct 15, 2025

Our onstar module has stopped working since last November after a software update and now issues are starting to cascade causing many other electrical issues to the point that I expect the car to leave my wife and 15 month old daughter stranded. Ours and many other vehicles are having this issue and when any question is asked to gm no response is given or we’re just told to keep waiting.

NHTSA ID

11753902

Incident

Nov 30, 2025

The contact owns a 2025 GMC Acadia. The contact stated that while driving uphill at an undisclosed speed, the vehicle hesitated, jerked, and stalled. The vehicle was taken to the dealer, where a computer reprogramming was performed; however, the failure persisted. Additionally, the contact stated that while driving 65 MPH and merging into the left lane, the automatic emergency braking system erroneously engaged and the vehicle hard-braked, nearly causing a rear-end crash. The contact immediately depressed the accelerator pedal, and the vehicle accelerated as intended. The contact stated that the failure was intermittent and had occurred approximately six times. The vehicle was taken to the dealer, where the cause of the failure could not be determined; however, the dealer advised the contact that the failure might be related to the camera system. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 3,000.

NHTSA ID

11752622

Incident

Apr 24, 2025

Mileage

3,000 mi

Today, June 11, 2026, my wife and 9 month old baby were on their way home from running errands in town when the vehicle started to violently shake, becoming frightened my wife tried to apply pressure to the brakes. When she pushed down on the brake pedal nothing happened and the pedal hit the floor. Our brand new 2025 GMC Acadia AT4 had just suffered catastrophic brake failure. So she pulled off onto the side of the road in hopes the uneven terrain would slow her down just enough to put it into park. Luckily enough it did. If it would have been 10 seconds later she would have been on a one way bridge where the speed limit is 60mph with no brakes. Four days prior to today on June 07, 2026 I sent a message to the individual that I bought the car from at the GMC dealership and told him that we had warning lights come up on the dash. He had me try and reset the screen but nothing happened. I asked when we could get it into a shop so it could be looked at he said that he would have someone reach out and schedule a time. I proceeded to ask if we were ok to drive the vehicle until then.To which he responded "If the vehicle isn't giving you issues mechanically, you should be good". Fast forward to today June 11, 2026 my wife is driving and has catastrophic brake failure. The vehicle was then towed by roadside assistance to the GMC dealership.

NHTSA ID

11743627

Incident

Jun 11, 2026

Telematic Modular Control is not working properly and part is on backorder. Dealership and GMC have refused to put into writing that my vehicle is safe to drive; however, they are refusing rental vehicle while awaiting arrival of part. Several of my safety features are not working correctly, my left turn signal went out randomly and my auto breaking has activated when there has been nothing near my vehicle.

NHTSA ID

11740057

Incident

May 2, 2026

The master cylinder failed under 10,000 miles. I was at 5000 miles. I am reading a lot of people have had issues with the master cylinder in the 2024 early 2025 models. Luckily I was in the driveway barely moving, but man if i were on a highway and it happened it could've been fatal!

NHTSA ID

11739018

Incident

Apr 11, 2026

When backing out of a parking spot of a store , I went to stop and pressing on the brakes nothing happened and I kept rolling backwards. I looked down to confirm I was pressing the brakes and my foot was on the brake pedal pressed firmly. I rolled to a stop put it in drive and checked the brakes and they worked like normal. I made an appointment at the dealership and had an appointment the next day. The said it did not have any codes, it preformed normal and passed inspected so there was nothing they could do about it.

NHTSA ID

11738784

Incident

May 18, 2026

Brake module malfunction Codes: “service ESC” “break assist failure. Press hard to break. Speed limited”

NHTSA ID

11736675

Incident

May 5, 2026

This Preliminary information communicates that a vehicle may be encountered with an SES light on and code P059F set. The technician is instructed to inspect the bracket in front of the grill shutter for being bent before replacing the shutter.

PI to help diagnose A/C concern

Certain vehicles listed above, may have a condition where coolant leaks from the radiator hose quick connect at the radiator inlet. This special coverage covers the condition described above for a period of 5 years or 60,000 miles (100,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after July 14, 2026, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to July 14, 2026, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage (“Customers”) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to remove the inlet hose and replace the seal. The repairs will be made at no charge to the customer.

• Improvements to active cabin ventilation • Additional protection for the health of your battery • Updates to help prevent excessive battery drain and overheating • Improvements to the software update system

• Fixes to help protect battery life. • Improvements to provide more accurate speed limit detection on the driver’s display. • Improvements to the availability of driver assistance features and fewer notifications or warnings. • Fixes to help ensure driver assistance features remain functional when the windshield freezes.

• Fixes to help ensure proper functionality for shifting. • Fixes to help protect transmission health. • Improvements to diagnostics to prevent vehicle not starting. • Fixes to help reduce instances of check engine light activation in cold weather.