2020 GMC YUKON XL Power Train Problems

I was traveling along i80 and suddenly the vehicle shutdown. I put the transmission in Neutral and coasted to a stop. Once stopped, I check It would not start or even turnover at that point. I still had all electrical services and such. The vehicle. I was stranded on i80. Then had to be towed to the nearest GM Dealer in Evanston Wyoming. Heritage Chevrolet GMC. It was left there for diagnosis where their technician, several days later diagnosed it with a bad engine. There was no warning or check engine light that appeared. I even have a picture from a little while earlier while driving earlier that morning. It took it because I was surprised it was getting 28mpg in v8 mode. but I am glad I had that photo to show no diagnostic lights were on.

The transmission failed while driving it and no warning lights were visible on the dashboard before hand or afterwards ..the vehicle is presently at a legitimate transmission repair shop and needs a new transmission supposedly this particular vehicle is evidently not included in the recall although the make and model are listed as part of the recall.

Driving and vehicle started making noise and lost ability to accelerate fully. Mechanic stated he’s had numerous issues with this model with lifter and camshaft damage especially with the 6.2l engine which has a recall on the 2021-25 models but not the 2020. $5,000+ to fix at this point.

The contact owns a 2020 GMC Yukon XL. The contact stated while driving at an undisclosed speed, the rear passenger side tire seized. The contact stated the vehicle was skidding, and the contact noticed an unusual sound. The vehicle was taken to an unknown dealer, but was not diagnosed or repaired. The contact related the failure to an unknown recall; however, the VIN was not included. The manufacturer was made aware of the failure, but no assistance was provided. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 46,000.

Mileage: 46,000

I possess a 2020 GMC Yukon XL. During multiple highway drives, I experienced a persistent loss of power. When accelerating from a stop, the vehicle struggled to shift gears smoothly, resulting in a rough, jerking motion. I opted to take the car to the dealership; however, before I could reach it, the vehicle lost all power and failed to change gears entirely. I am fortunate this complete loss of power and ability to change gears did not occur while I was on a busy highway. I purchased the car when it had 63,000 miles, and at 120,000 miles, the dealership informed me that the transmission had completely failed. A replacement of the transmission will be necessary.

Lifter failure Car could not be driven and were stranded at night in the dark. The car had to be towed but the tow truck did not arrive until morning. It was an EXPENSIVE repair at GMC dealership. GMC confirmed this was the issue Car started to make a loud noise, so I stopped driving. It is NOT an old car - 2020 and happened December 2024 GMC said it is not something they will cover

The contact owns a 2020 GMC Yukon XL. The contact stated that while his wife was driving approximately 65 MPH, the transmission started to slip out gear and the vehicle was losing motive power. The contact's wife had not observed any warning lights. The contact’s wife drove the vehicle back to the residence and while attempting to place the vehicle in park(P), the vehicle failed to respond. The contact had the vehicle towed to an independent mechanic who diagnosed the vehicle and determined that the transmission needed to be replaced. The vehicle was repaired; however, the contact stated while driving approximately 65 MPH, the check engine warning light illuminated. The contact was able to drive the vehicle to the residence. The contact stated that while attempting to restart the vehicle, the vehicle was idling roughly with white smoke coming from the exhaust pipe. The contact drove the vehicle to a different independent mechanic who performed an engine pressure test and determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 102,000.

Mileage: 102,000

The contact owns a 2020 GMC Yukon. The contact stated while driving 10 MPH, the vehicle lost motive power and stalled. There was no warning light illuminated. The vehicle was not able to be restarted. The vehicle was towed to the dealer where it was diagnosed that the bearing in the driveshaft was worn. Additionally, the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 107,000.

Mileage: 107,000

The contact owns a 2020 GMC Yukon XL. The contact stated while driving 65 MPH, the temperature gauge started rising quickly. The contact stated that the check engine warning light was illuminated. The contact was able to park on the side of the road. The vehicle was not drivable. The contact towed the vehicle to the local dealer, where it was diagnosed with needing the transmission to be replaced. The vehicle was repaired but continued to experience the failure. The contact took the vehicle back to the local dealer, where it was diagnosed with needing the transmission to be replaced for a second time. The vehicle was repaired but continued to experience the failure. The contact took the vehicle back to the local dealer, where it was diagnosed with needing the transmission cooling line to be replaced. The vehicle was repaired but continued to experience the failure and noticed the transmission was leaking. The contact towed the vehicle back to the local dealer, where it was diagnosed with needing the transmission cooling line to be replaced for a second time. The vehicle was not repaired. The manufacturer had not been informed of the failure. The failure mileage was 127,549.

Mileage: 127,549

Transmission required replacing at 82,500 miles. Vehicle completely lost power during my morning commute. Thankfully, I had exited the Interstate and was on a city street with minimal traffic. Also thankful that I took and extended warranty at the time of purchase less than a year ago at 61,200 miles.