2020 GMC YUKON Complaints

I took my vehicle to a dealer to repair something unrelated to the engine. They said the oil pan was leaking and pulled the pan to discover the crank shaft bearings were failing. The vehicle has 53,765 miles at this point. This appears to be the same defect being recalled on the 2022 through 2024 models.

Severe transmission shuttering destroyed my transmission and I need a new one according to a local body shop and a GMC service center. This is a KNOWN issue with these 10 speed transmissions, but they will not recall the ones from this year, they only recalled newer models. Car has been inspected by a local autobody shop, a 3rd party warranty company, and a GMC dealership service center. Shuddering causes severe shaking while driving between 25-65mph. No lights or other symptoms, just started occurring randomly. Purchased car Feb 2025, brought it in to local auto shop November 2025 and they could not get a transmission for months. They stated one was set to be delivered by GMC Feb 6th 2026 and they day before arrival GMC called them saying it was back on back order. Called the dealership in April 2026 and they stated they were not backordered. Had vehicle transferred to dealership service center and they say it’s still on national back order with no ETA. I have been waiting for over 6 MONTHS for a new transmission. This car has been undrivable for almost longer than I have been actually able to drive it.

Multiple repairs on brakes and tires are mismatched old since purchased in 2023 tires deflate gas cap missing

Engine started with a rough idle, I attributed this to mileage. Check engine light did not come on until days before scheduling service. Per diagnostic from Chevrolet service department: Lifter roller damaged and camshaft damaged on lobe. need to replace camshaft and lifters. this has been diagnosed by Chevrolet dealer mechanics at Ferman Chevrolet North Tampa, in Tampa Florida. Check Engine Light came on 4 days before I took it for diagnostic. Chevrolet and GMC have issued a recall on 2021+ but this remains outside that recall. I'm quoted for an $11,343 repair on a vehicle that has gotten regular synthetic oil changes at the dealership since I bought it with approx 80k miles on it. Metal was not noticed in the prior oil changes, latest which was

The contact owns a 2020 GMC Yukon XL. The contact stated that while driving 70 MPH and attempting a lane change, the vehicle failed to accelerate as intended. The contact pulled over to the shoulder and restarted the vehicle, but the vehicle struggled to restart and failed to accelerate as needed. The vehicle was driven to the residence at a reduced speed. The contact referenced NHTSA Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING); however, the VIN was not included in the recall repair. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 70,000.

Driving on the highway when the steering warning light came on and then I had a loss of complete steering on the highway. Somehow was able to get off the highway but not completely off the road. Back end of the vehicle was still in harms way I could not turn that wheel at all this is a complete safety issue and could have easily caused an accident and could have been deadly. There was no warning before that just went out while driving at highway speeds on the highway. Also had to wait two hours for a tow. Vehicle is currently being diagnosed at the dealer and will provide all receipts once completed. This is an issue that needs to be addressed. Huge safety concen

Lifters broke and destroyed the camshaft at 99,000 miles. Total repair cost $8,200.

The 2020 Yukon started to have serious loss of speed and decelerating issue when the vehicle would slow down and down shift to a lower gear. The issue with this is that once it downshifted it woul not engage in a gear again and leave me stranded on the road. I had to turn off the car and restart it for it to reengage in a gear enough to get it moving again and sometimes I had to try more than once to get it moving once it no longer wanted to engage in a gear. So in the 10 mile drive, I was left stranded at least 15 times. Each time I had to restart and restart again for the vehicle to engage in a lower gear. Once moving, it would sometimes it would engage in a higher gear and sometimes it would not. Thank goodness I wasn't traveling on the highway when this happened. Beware to anyone if this was to happen on the highway while in the middle lane while in traffic. And the check engine light never turned on and thus no code to help detect the issue. Took it the day before to have it looked at and was told nothing was wrong with it since there was a code and they could not duplicate the issue I described. WHAT?? They reset some transmission computer setting but it only made it worse by the next day. Now this 6 yr on 2020 GM Yukon is at the dealership service department requiring a new transmission for $7200. Said that the transmission fluid was showing particles of stuff and color was 'burnt', I think. Transmission fluid was changed at it's regular check up time so that didn't cause the issue and nor should it have bits and pieces in it and discolored. Is there any recourse to GM and it's crappy transmissions??

TRANSMISSIONS ISSUES. Not transitioning/ shifting into gears smoothly or at all. When it does transition/shift it is rough and harsh. When my car transitions to a lower gear then it will not transition back up to a higher gear causing my vehicle to drop speed significantly that I am a safety hazard on the road. Example: when it shifts to a gear high enough that the vehicle can reach 40 mph and there is a need to decelerate it does but once it drop to lower gears it cannot engage again to a higher gear leaving me stuck going at most 10 mph with not opportunity to excelerate in traffic to a higher speed. The transmission control module (TCM) software was updated with no improvement.

The contact owns a 2020 GMC Yukon XL. The contact stated that while driving at 35 MPH, there was an abnormally loud ticking sound coming from the vehicle. The driver was able to pull over safely. There were no warning lights illuminated. The vehicle was towed to an independent mechanic who determined that the lifter was stuck in the bore, and there was a misfire in cylinder #7 due to a stuck camshaft. The local dealer was not contacted. The manufacturer was not notified of the failure. The failure mileage was approximately 113,997.