2025 GMC Yukon complaints

While driving on the highway, my SUV lost speed and went into what I believe was limp mode and the check engine light came on. I was unable to accelerate quickly which was very dangerous on the highway as I was only able to very slowly go about 45 MPH on a 65 MPH highway. After the dealer inspected it, I was told I needed a new engine, oil cooler, and turbo. They said it had metal in the oil. My SUV only had 2138 miles at the time of incident.

The contact owns a 2025 GMC Yukon. While the contact's husband was driving at an undisclosed speed, the brake pedal was depressed; however, the vehicle failed to stop as intended. The contact stated that the brake failure warning light was illuminated. The contact’s husband depressed the brake pedal and noticed that the brake pedal was firm and difficult to depress. The contact stated that an error message indicated that the vehicle was decelerating. The contact's husband depressed the brake pedal and the vehicle decelerated to 40 MPH. While the contact’s husband was slowly driving into the driveway at the residence, the brake pedal was depressed; however, the vehicle failed to stop. The contact’s husband immediately shifted the gear shifter into park(P) to stop the vehicle. The contact stated that the failure had occurred while on the way home from a family trip. The vehicle was towed to the dealer and the vehicle was diagnosed with a failed brake master cylinder assembly, a failed brake control module, and a failed brake plunger. The contact was informed that the brake master cylinder assembly, the brake control module, and the brake plunger needed to be replaced. The vehicle was not repaired. The contact was informed that the parts were on back-order. The manufacturer was not made aware of the failure. The failure mileage was approximately 3,150.

We purchased a brand new 2025 GMC Yukon on 5/19 and on 5/22, the vehicle would not release the parking brake. Multiple sensors / alerts were displayed, brake assist failure, press hard to brake, speed limited, service ESC, service traction control, check engine light, brake park, service ABS brakes. Vehicle was not drivable. Towed to Marhofer GMC, problem was replicated next day. Was informed that brake booster and master cylinder were bad, however on a national back order. We are now 3 weeks out, without a repair completed or parts. Was also informed by dealer that there is a service bulletin out on this vehicle. Vehicle has 170 miles.

The contact owns a 2025 GMC Yukon. The contact stated while driving at an undisclosed speed, the vehicle was vibrating abnormally, and the engine seized. No warning light was illuminated. The vehicle was restarted and taken to the dealer to be diagnosed. The contact was informed that there were metal shavings in the oil pan, causing engine failure. The contact was informed that the engine needed to be replaced. The vehicle was being repaired. The manufacturer was made aware of the failure and a case was filed. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 3,000.

At approximately 500 miles, the vehicle started to shutter and misfire at highway speeds (60-70 mph). The check-engine -light began to flash at the same time. We have a video and this happened 3 times before taking it to the dealer. This is a safety concern because it began to lose power on the highway. The issue was confirmed by the dealer and found to be damaged connecting rod bearings.Gm engineers are aware of the vehicle and would not approve the ordering of a new engine by the dealer until the engine was completely torn down to the point of failure.

I would like to express my frustration and concern regarding a serious issue with our brand-new 2025 Yukon Denali truck. The vehicle, which has only 934 miles, has experienced a transmission failure. We picked the vehicle up on [XXX] and since February 27th, it has been at the dealership for repairs—now more than a full month. Initially, the torque converter was replaced, but that did not resolve the issue. After only a mile or two of driving, we returned the truck back to the dealer for further evaluation. Subsequently, after consulting with technical assistance, the dealership confirmed that the valve body needs replacement. As I'm sure you're well aware, this part is backordered nationwide, adding significant delays to an already troubling situation. It is hard to comprehend how a brand-new truck can fail virtually right off the assembly line. I am disappointed that we have had to deal with such a significant defect and even more disheartened by the extensive wait for repairs. This experience has left us questioning the safety and reliability of our vehicle. Given the circumstances, I believe more should be done to resolve this matter quickly and effectively for us. GM has been well aware of this transmission for years. The most recent recall dated December 13, 2024 for the same issue on the 2021 – 2022 model years of most of GM’s product line suggest this problem has not only been a known issue for many years but with the failure of my new vehicle for the same issue prove

The digital instrument cluster blacks out randomly at times going down the highway. This is a safety concern because you can't see how fast you are going. The problem has been inspected by and confirmed by a dealer service center. The failure began without warning and seemed to occur after the car went through a GM software update. The service manager for the GMC dealership said this is likely a bug that GM will have to solve through future updates. The car's electronic system was reset but the problem persists.

I had Three 2024 6.2L engines in my GMC Sierra BLOW UP.....