Table 1 shows one common power train related problems of the 2020 Chevrolet Tahoe.
| Problem Category | Number of Problems |
|---|---|
| Power Train problems |
Lifter failed on my chevy Tahoe 6. 2l engine at ~75k miles in September 2025. One lifter bank was replaced. No reason for lifter failure was given. Less than 5 months later the other lifter bank has failed and damaged the cam shaft. Again, no reason for failure was provided. Failed lifters can cause catastrophic engine failure, which is incredibly dangerous when the vehicle is in motion. No check engine lights or and warnings occur with the lifter failure, it is only identified by the driver through the tapping noise from the engine. Even a cursory review of forums and complaints reveals that lifter failure is widespread on this engine and that manufacturing defects have caused issues with this power train dating back to 2019, not just the recalled 2021-2024 models.
I was starting to accelerate to a higher level of speed onto the highway; 55 mph going up a hill. I was unable to accelerate much as I pushed on the gas, however the rpm's would get higher. While I was at 45 mpg the rpm's were at 3. 5. All of sudden my service engine light came on. I knew something was wrong. Turned around took my car back home very slowly, had my husband come look at my car, who has mechanical experience. Transmission fluid is dark and gritty; when its suppose to be a red in color and smooth. I am now needing to replace a transmission in a vehicle that is 5 years old. How is this possible? I have owned the car for 2 years. Why has these not been recalled yet? why has these not been looked into further? we are paying a lot of money for these vehicles to turn around and put a new transmission, which isn't cheap into a vehicle that is 5 years old. Any assistance to look into these complaints would be very helpful. I am just glad no one was hurt and I was able to get my vehicle home safely. I keep up with all of the routine maintenance of this vehicle on a regular basis.
On June 17th, 2025 while driving from [xxx] back to my home state of [xxx] , I experienced an engine malfunction in chester, va where the 6. 2 l87 engine was shaking and had severe hesitation. It was diagnosed by the Chevrolet dealership in chester, va as suffering severe failure of all 8 fuel injectors, fuel rails and connector harnesses, resulting in a 15 day repair wait and a $4,644. 50 bill not including other expenses such as lodging/car rental. At this time my vehicle had 52,182 miles. After this I attempted for 3 months for gm to cover the repair as the vehicle was less than 5 years old and less than 60,000 miles under the 5 yr/60k warranty but denied it. On March 26th, 2026 while driving on the parkway at about 60 mph, my vehicle experienced loss of power (slow deceleration, shaking/hesitation) and I immediately took it to the repair shop where it was diagnosed as a p0308 code (misfire on cylinder 8) which caused a repair of the #8 spark plug, ignition coil and wire resulting in a $380. Repair. Two days later, I experienced the same issue and then took it to an engine diagnostic specialty shop where I have been told that this issue will run about $4,000 due to valve and comprehension issues on an engine that has 60, 680 miles. I have seen numerous l87 engine complaints on chevy forums with no assurances that repairs or engine replacement will rectify the issue and feel that this is an issue that gm should be addressing for safety issues and an economic loss to its customers. I am hoping that your investigators can help the many people that have been left stranded by this incompetence and lack of admission of gm's part. Repair invoices available upon request. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).
There is an unusual lifter/ticking noise coming from the valve covers on my vehicle. The vehicle is scheduled to go to the Chevrolet dealership on the 15th of this month but it sounds like the numerous other gm motors that have the failing lifters.
I was at a red light and when I tried to take off the rpms reeved up and my car would not move so I turned it off, opened and shut my door, restarted my car and it would move 100yds if that, then the rpms shot up again (acted like it couldn’t shift out of first gear). Car has 101,647 miles, was serviced on time, no issues before and no warning lights on the dash came on before or after the issue happened. Car has not been repaired yet and still no lights on the dash.
While driving, the vehicle's rpm's accelerated quickly and then the vehicle stopped in the middle of the road and would not move. I could not even get it to the side of the road to be out of traffic. All regular maintenance has been performed. The mileage is almost 100,000, but not there yet. This could have been a very dangerous situation as I was heading to an interstate highway. No warning lamps ever lit up and no strange sounds or vibrations ever came from the vehicle. This happened suddenly. No warning whatsoever. The vehicle is being repaired today. The transmission is being replaced at a cost of $5500. 00.
High pitched whine between 2nd and 3rd gear, dealership states fluid and filter full of metal shavings transmission needed replaced.
While driving making left and right turns a clicking noise was noticed. Vehicle also felt like it was engaged in 4wd when making turns on loose pavement by skipping, vehicle confirmed to be in 2wd mode. Vehicle has less than 10,000 miles. Dealership was able to determine that the noise was coming from the front hubs and saw metal shavings. Chevy dealership suggested to have both front hubs replaced.
The contact owns a 2020 Chevrolet Tahoe. The contact stated that while driving upwards of 80 mph, the vehicle would violently shake without warning. The vehicle was not taken to be diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 20,000.