2017 Chevrolet Suburban: complete transmission failure

Filed Aug 10, 2026 · Transmission · 84,478 miles · WA

The contact owns a 2017 Chevrolet Suburban. The contact stated that while driving at an undisclosed speed, the transmission overheating warning light illuminated. The vehicle was driven to the shoulder of the road and waited for the engine to cool down. The contact stated that the failure reoccurred. The failure reoccurred every 15–20 miles while driving. In addition, the contact stated that eventually the vehicle stopped driving forward. The vehicle was towed to the dealer where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was repaired. The failure reoccurred almost two years later. The vehicle was towed back to the dealer where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The vehicle was taken back to the dealer where it was diagnosed with transmission failure. The contact was informed that an unknown part was not replaced during the transmission repair. The contact was informed that the transmission needed to be replaced. The vehicle was repaired. In addition, the contact stated that the dealer was the dealer who completed all three of the repairs. The manufacturer was made aware of the failure but provided no assistance. The contact was informed that the failure was not due to a manufacturing defect. The failure mileage was approximately 84,478.

Filed Jun 17, 2026 · Transmission · 125,000 miles · FL

The contact owns a 2017 Chevrolet Suburban. The contact stated that while driving at an undisclosed speed, the vehicle suddenly came to a complete stop. There was no warning light illuminated. The contact attempted to accelerate, and the vehicle drove sluggishly as if the tires were flat. The vehicle was taken to the dealer where it was diagnosed with transmission failure. The contact was informed that the transmission and motor mounts needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 125,000.

Filed Jun 10, 2026 · Transmission · NY

I am writing to formally report a critical safety defect in the vehicle’s transmission system. While driving, the vehicle began experiencing severe vibrations, accompanied by an abnormal increase in engine RPMs, while the vehicle failed to accelerate appropriately. The vehicle became unresponsive, limiting my speed to 15-20 mph. This forced me to make frequent stops every 6-7 minutes to allow the transmission to cool down, as the car would not sustain normal speeds. ​This failure created an extremely dangerous situation on the highway. Due to the sudden loss of power and inability to maintain traffic flow, I was subjected to aggressive behavior from other drivers, who were honking, gesturing, and clearly endangered by my inability to accelerate. This transmission failure is a major safety hazard that renders the vehicle unreliable and dangerous to operate in any traffic condition. I am requesting an immediate investigation into this transmission defect and a permanent resolution from General Motors, as this issue poses a significant risk of causing a collision. I spoke with the owner of AAMCO, and he showed me that they have 7 of these Chevy Suburbans, GMC Yukons, and Chevy Tahoes, Escalades, and they all have the same problem, the transmission needs to be replaced, and General Motors is not notifying car owners about this problem, but it should.

Filed Jan 17, 2026 · Engine, Transmission · CA

Component or System Failure The vehicle experienced two major mechanical failures. First, the transmission failed and required full replacement shortly after the expiration of the 60,000-mile powertrain warranty. At the time of this failure, the vehicle had approximately 61,000 miles. Second, at 100,119 miles, the engine suffered a catastrophic failure that required complete engine replacement. Safety Risk The transmission failure impaired normal drivability and created a safety risk due to reduced or unreliable propulsion, which could have resulted in loss of power while driving in traffic. The engine failure rendered the vehicle inoperable and could have posed a serious safety hazard if it had occurred while the vehicle was in motion, including sudden loss of engine power. Problem Confirmation and Inspection Both failures were diagnosed and confirmed by dealership service personnel, who determined that full replacement of the transmission and later the engine was necessary. The issues were identified through inspection and standard diagnostic procedures. Warning Lamps or Symptoms There were no clear, persistent, or meaningful warning lamps, messages, or symptoms that would have reasonably alerted the driver to an impending transmission failure prior to it occurring. Any warning indicators appeared at or immediately before the failure. Similarly, there were no significant warning signs that would have predicted the engine failure prior to the need for complete replacement. Additional Information Both the transmission and engine failed at relatively low mileage for major powertrain components. The transmission failure occurred just beyond the powertrain warranty threshold, and the engine required full replacement at 100,119 miles. . These failures suggest a potential defect or durability concern affecting critical powertrain systems.

Filed Jan 22, 2025 · Transmission · MN

Transmission failed and needed to be replaced.

Filed Aug 26, 2024 · Transmission · PA

6L80 transmission failure at only 82k miles. This is a known Chevrolet fail point on all vehicles equipped with this transmission yet Chevrolet does nothing to recall or repair the issue. Customer absorbs full cost of repair ($6k) and chevrolet acts like they know nothing about it. This happens on the highway at speeds and vehicles suddenly have no drive putting occupants at risk of other traffic and trying to get off the roadway where there may be no safe zone to stop.

Filed May 16, 2024 · Transmission · FL

Transmission failed at 82,000 miles. Had to be completely rebuilt. Paid $5,486.87 out of pocket. (see receipts attached)

Filed Mar 15, 2024 · Suspension · OK

The first problem that happened with the 2017 Chevrolet Suburban was we were driving and the 1 of 2 brake boosters gave out. We had to contact with customer service of Chevrolet of informed them about what happened. We took the vehicle to a local dealership to have fixed, then after that we started to have problems with the transmission, fuel pump and the air ride. With the transmission/electrical system you would be driving down the road, the next thing that you will know is that the door locks will lock then unlock, then the vehicle will would let a big amount of smoke out of the vehicle, and then the vehicle would power down to 20mph. You would have to drive 20 for 5 miles until the vehicle would quit and you could drive normal. I was going to go for my mandatory user maintenance and I did not get 2 miles out of town and the transmission went out of the vehicle.

Filed Dec 12, 2023 · Transmission · FL

While driving at 70 mph transmission went out. Shifted from N back to D but no response. Coasted to shoulder of interstate and stop. Shut off vehicle and restarted but vehicle would not move. Shut off again and restarted this time if went into D. Could not any faster than 35 mph. Transmission would not shift automatically. Tried manually but same results. Was able to exit interstate. Got vehicle to Chevy dealership and was told I needed a new transmission. Vehicle has 106,000 miles.

Filed Oct 4, 2023 · Engine · NY

Transmission failure. loss of movement into intersections causing dangerous situation for my family. problem has been reproduced by local independent auto tech. I am about to go through my insurance since there is no recall on this apparent known issue by GM. no warning light to notify me of any issues.

Filed Sep 14, 2023 · Transmission · 98,988 miles · IN

While driving on interstate 465 in Indianapolis on Tues 9/12/23 my 2017 Chevy Suburban completely lost any ability to accelerate. Fortunately I was able to coast over to the shoulder and have the vehicle towed to the closest Chevy dealership. The dealership determined it was a catastrophic failure of the transmission and recommends full transmission replacement for the vehicle to be drivable again.

Filed Sep 12, 2023 · Transmission · TX

A Chevy Suburban is a vehicle made to transport large families. You would assume these are made with true utmost safety precautions in mind to protect families. At just over 47K miles on my vehicle, our transmission went out, even though we have regular maintenance completed on our vehicle. The check engine light came on while driving on the highway. Was able to make it to a shop who verified it was the transmission. Took it to the dealer who also confirmed it is the transmission, and their 4th one on a newer Chevy Suburban to come in just today. They said they have 37 on the lot with transmission issues on newer Chevys, and some blew out while driving. We were very fortunate it did not blow out while driving, but it’s unacceptable for a family car’s transmission to go out with so little mileage. This has to be a major defect and cause for concern.