2020 GMC Yukon

While driving to Lake Placid, NY, I experienced sudden loss of propulsion as I was driving approximately 60 mph. I was able to brake and pull over to the shoulder. I was not able to restart the vehicle - engine was dead. We were flat bed towed to a garage in Lake Placid where it was confirmed that the engine was inoperable. The vehicle is now at. GM dealer in Potsdam, NY. I believe this engine should be part of the recall!!

The contact owns a 2020 GMC Yukon. The contact stated that while driving at an undisclosed speed, the vehicle inadvertently lost motive power, prompting the contact to pull over to the shoulder of the roadway. The contact became aware that the vehicle continued to move forward while shifted into Park, Neutral, or Reverse. The contact stated that the message "Transmission Overheating" was then illuminated. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. 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 119,000. The contact declined to provide the VIN.

The contact's wife owns a 2020 GMC Yukon. The contact stated the vehicle was taken to an independent mechanic for a tune up. The contact stated that upon picking up the vehicle and driving, the transmission was slipping in and out of gear. Additionally, the contact stated while at a complete stop and depressing the accelerator pedal, the engine revved; however, the vehicle hesitated to respond, and the vehicle jerked while responding. The contact stated that the vehicle slowly picked up speed, and the transmission was slipping in and out of gear. There was no warning light illuminated. The contact stated that his wife had noticed that the vehicle made an abnormal sound while driving. The vehicle was taken to the dealer, where it was diagnosed that the torque converter had failed. The dealer determined that the transmission needed to be replaced. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 107,267.

Hello, I’m calling about the GM transmission recall recently announced in March 2025 affecting 2020 Yukon vehicles. My Yukon experienced what I believe is the exact same issue described in the recall. Our vehicle lost forward gears and almost caused a crash. A certified mechanic confirmed the transmission fluid was burnt and full of clutch material, with internal transmission damage. We are asking for this to be handled under the recall, as the issue directly matches GM’s known safety defect. We need this resolved immediately — the vehicle is unsafe to drive and the failure happened before we even knew about the recall. Our GMC Mechanic stated the following : Needs immediate attention Recommended service Transmission: test drove verified no forward gears after 3 minutes of driving. fluid brown and burnt full of clutch material. internal damage to transmission. A transmission flush is a process that makes it possible to clear the old transmission fluid from the vehicle's transmission. This process also helps to remove residue of older transmission fluid from the converters, coolers, and cooler lines that often are part of the design for the transmission.

The contact owns a 2020 GMC Yukon. The contact stated that while refueling the vehicle, the fuel filler neck was not allowing fuel to flow into the tank. There were no warning lights illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the fuel filler neck. The contact was informed that the fuel tank filler assembly needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure but provided no assistance. The failure mileage was approximately 42,000.

Shortly after the warranty expired my torque converter went out and damaged the transmission. After speaking with several transmission shops this is a known problem with this vehicle! The torque converter and transmission are poorly made, and no matter if you get all of your services this will still happen to you! This should be a recall on this vehicle. Less than 4 years old and I am having to spend over $5,000 to replace a transmission. The vehicle just hit 100,000 miles. If this is a known issue with this vehicle why has it not been recalled? The dealership tried to tell me I just needed battery cables replaced. I decided to get a second and third opinion and as I suspected the transmission is gone. There were NO warning lights, the car just suddenly started not wanting to change gears while driving. At the red light it jumped and wouldn’t move which made the car behind me almost hit me. There were no other symptoms until the gears started not wanting to change. No noises, smells, or any indication that something was wrong. The vehicle is now at a transmission shop awaiting repair. This needs to be a recall if this is a known issue.

Ambient temp was 100 degrees for reference. Had been driving about 5 hours. Went to stop and had no power assist for brakes. This continued for at least 20 miles. Stopped and confirmed vac hose was connected. I tried to remove vac hose to check for vac at booster but was afraid I might break the part. Electrical plug at vac hose booster connection was secure. Continued driving and it began to work again. Condition: brake pedal took considerable foot pressure to apply brakes. Zero power brake assist was available. My qualifications; a past ASE master teck.