2021 Chevrolet Tahoe Engine began misfiring and check engine light and ESC warning indicators displayed as I was driving. I pulled over and shut off vehicle, read manual and restarted engine. Same problems occurred, so I drove to Chevrolet dealer which was a mile away. The advisors said I shouldn-??t drive it on the expressway or any further since engine had known problems that GM was aware of and it would blow up. Scans showed P0300 & P0305 for Cylinder 5 misfire. Major Repair included replacement of all lifters and push rods on both banks and the camshaft taking 17 days. This engine should have a GM Recall due to its severity. I was told the engine usually blows up before the warranty period is over and GM would just fix it. Unfortunately for me, my engine failed after full warranty and while I was traveling out of state to a family wedding, costly me directly. GM did pay half of the cost of repair which indicates admitting fault. The major safety concern is when an engine blows up and the driver cannot control the vehicle causing accidents or fire (and being stranded). There were No previous indications or symptoms of engine failure prior to date the problem occurred. Police departments in Illinois have had the same problem with this engine and their entire Tahoe fleet needed a new / repaired engine. This is an unacceptable action by GM to just wait for the problem to occur instead of proactively recalling the engine for repair.

- Cape Coral , FL, USA

This is a fairly new vehicle, so to be told we need a new engine when we-??ve had the car for only 4 years is ridiculous! We were driving one day and heard a knocking sound coming from the front of the car. We made it home, but when we tried to leave the next time, we only made it halfway down our driveway when we heard a loud knocking noise from the front and the car suddenly stopped. We were dead in the water and needed to get the car towed back to our house. The gear shift was also stuck in drive and we couldn-??t turn the car on. The engine had completely seized up. The tow truck driver had to get underneath the vehicle in order to disengage the gear shift and allow us to shift into neutral so that we could get it back home. When we had it towed to our mechanic, they told us that it was a bearing failure and the connecting rod had caused our engine to seize up. I-??m just glad we weren-??t on a major highway or busy street at the time this took place. This is supposed to be our family vehicle and it has been out of commission for more than 6 months because we haven-??t been able to afford to replace the engine. We-??ve tried contacting GM directly, but they said we were beyond our warranty and there was nothing they could do to help us.

- Deer Island, OR, USA

GM has a known issue with engine lifters on this model engine that fail around 60,000 miles. Customer service managers even stated so themselves and GM has a TSB related to this. Repair bill is $5K-$6K if it doesn-??t bend the cam shaft and upwards of $10K if cam is bent. This is a huge safety issue because vehicle fails while in motion, shakes violently, and numerous safety features the driver relies on turn off.

- Charleston, SC, USA

My wife was driving the vehicle when all of a sudden the engine started knocking and throwing a bunch of codes. The engine has a bottom end knock and it seems this is a known problem with these engines.

- Hurdle Mills, NC, USA

Vehicle has no warning of issues. Regular maintenance had been performed and had 80k miles. Driving down a 4 lane the engine locked up and lost power. We have been waiting on it to be repaired for 4 months now. The engine is back ordered from GM and no one can find used ones. We found a refurbished one but it also locked up within 30 minutes of being installed. I was warrantied so now we are having ours rebuilt but is costing us $14k.

- Duncanville, AL, USA

I am getting heavy oil consumption and the dealer just keeps on wanting to run tests and not fix the actual issue

- Lyons, IL, USA

On [XXX] I was driving in the [XXX] in El Paso Texas at about [XXX] I was about to enter [XXX} and the vehicle suddenly stopped with no warning! I was able to pull to the side and put the blinkers because the traffic was heavy and could of had a vehicle crash into me if I had not maneuver the vehicle quickly(My two daughters where with me in the vehicle). The vehicle prompted to start the vehicle, which I did so and continued my way. As soon as I was able to get into the [XXX] the check engine light turned on, and the forward collision warning message on the display. I stopped to my nearest Autozone to get some help as the vehicle started to make a noise too. They connected their computer and told me that the vehicle was given a message of a faulty cylinder, they told me I should not move the vehicle until I had it inspected on a GM dealership. Which I did on Friday December 20, 2024, I am waiting for a full diagnostic to see what had happened to my vehicle. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- El Paso, TX, USA

I have taken this vehicle two times to the dealers that sell Chevrolet. The first time it was there for 5 hours and nothing was done and the second time the service agent said there was no recall on this vehicle when obviously there is one.

- Miami, FL, USA

The contact owns a 2021 Chevrolet Tahoe. The contact stated while driving 5 MPH in the driveway, the vehicle stopped and stalled. The vehicle failed to restart. The vehicle was towed to an independent mechanic who determined that the fuel pump control module needed to be replaced. The vehicle was repaired. The contact called the local dealer and was informed that there were no associated recalls. The vehicle was not diagnosed or repaired. The manufacturer was contacted and confirmed that the vehicle was not included in NHTSA Campaign Number: 21V739000 (Fuel System, Gasoline). The failure mileage was approximately 30,000.

- Punta Gorda, FL, USA

Driving on the I-95 I abruptly lost power driving in the left lane, RPM dropped all the way down and speed was rapidly decreasing. I had to pull over on the shoulder in the most safe manner possible for myself and other drivers on the road; but it was not without any risk. The body of the car was rattling on my way to the shoulder and the car shut off before I could put the car in Park in a safe place. With my hazard lights on I tried restarting the car but the enging would not turnover, the starter would run and the car would rattle about all whilst creating a traffic jam. Once i noticed the engine light and yielded to the car's inabiltiy to start up, we got the attention of a FHP State trooper who called in a Tow truck for us. Getting te car onto the tow truck in traffic also increased the risk associated for everyone involved. Aftert succesfully oading the car, which was no smooth task as the car could not shift into Neutral; we took the car to my local Firestone. After a diagnostic test done the following morning, we were notified of a fuel pump issue that has been on the recall list for my vehicle, but NOT associated with my VIN.

- Coconut Creek, FL, USA

Stopped for gas, then proceeded to leave store, the check engine light came on, and car immediately shut off while on the highway going ~25mph. Car would not turn back on, and then lights for fuel machine error started coming on. Car sat there trying to turn on, lights off, and then would say push start button, but nothing happened. Car began to shake and continued to try to turn on, yet nothing happened. Car was towed to home, sat for an hour and then started again, check engine light remains on.

- Mont Belvieu, TX, USA

The contact owns a 2021 Chevrolet Tahoe. The contact stated while driving at various speeds on several occasions, there was a banging sound coming from the engine compartment. The vehicle was taken to a dealer where it was diagnosed and determined that the cam lifters needed to be replaced. The contact stated that the failure reoccurred two weeks later. The manufacturer was notified of the failure. The failure mileage was approximately 11,400.

- El Paso, TX, USA

I am experiencing loss of power just like the recall shows for campaign 22V036000 powertrain. Engine stall in the middle of the street just like it shows for the fuel system 21V73 9000. I have stalled in the middle of the street including today four times and a month. The dealership can-??t seem to find what-??s wrong. Nor other places. I don-??t think they are looking hard enough at the dealership. I almost got killed by another car going at least 65 mph while I was stuck in the middle of the street at a stoplight. These are all different days. While working and people in my car.

- Tolleson, AZ, USA

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving 35-?"40 MPH, the vehicle abruptly shut off. The contact continued to pump the brake pedal to alert oncoming traffic. There were no warning lights illuminated. The contact called the Police, and the vehicle was towed to an impound lot. The vehicle was towed to the local dealer, where it was diagnosed that the fuel pump control drive module needed to be replaced. The vehicle was repaired. The manufacturer was contacted, and a case was opened. The contact stated that the failure was related to NHTSA Campaign Number: 21V739000 (Fuel System, Gasoline). The failure mileage was approximately 38,000.

- Jacksonville, FL, USA

As a traffic crash reconstructionist, the issue is a MAJOR SAFETY ISSUE. My wife was exiting a residential driveway when the vehicle started to stutter and immediately shut down with no power or any capability to get the vehicle off the road. The shutdown caused the blockage of a residential street on a Friday afternoon, until the correct tow truck arrived. This was due to the fact the vehicle could not be moved due to not being able to start the engine nor the ability to place the vehicle into neutral, without starting the engine or crawling un der it with tools. It was determined the fuel module went bad. There was no warning of the failure of the component. Luckily the shut down of all components of the vehicle did not occur on a high speed or highly traveled road since I did not have any control of the vehicle after the fuel module failed. This is not the first report of the issue to NHTSA. Hopefully something will happen to find a fix to put the vehicle in neutral without tools, for the safety of the motoring public.

- Xenia, OH, USA

Third time engine only cranks and will not start. I was forced to disconnect the battery and reconnect after a short while to get the vehicle to start.

- North Port, FL, USA

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed and making a left turn, the vehicle lost motive power and stalled in the middle of the road. The contact was unable to restart the vehicle. The contact stated that the gear shifter had seized in park. The vehicle was towed to the dealer. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure. The failure mileage was approximately 16,000.

- Cape Coral, FL, USA

This is the second engine I-??ve had replaced since I bought the vehicle in December 21, 2023. The first engine failed in August of 2022 while I was driving on the highway. The vehicle began to smoke and shut down while I was driving on the highway. The vehicle shut down and I had to use the current momentum of the vehicle to pull over to the shoulder. The vehicle would not come out of gear and would not restart. I complained of transmission problems ever since the engine was replaced. The service department escalated the concerns to the GM engineers who never gave directions to check the transmission fluid or physically check the transmission. January 24 of this year I was on the highway driving to work when the vehicle again shut down. The dash stated restart the vehicle. While in motion the vehicle was trying to shift to neutral. I informed the dealer of this message and they claim they took note of it. With the vehicle not being able to start or move out of gear the tow truck had to drag the vehicle onto the bed of the tow truck. This also occurred on the first engine failure as well.

- Chicago, IL, USA

The failed component was reported to be the Coolant Surge Tank. This component cracked and begin to leak engine coolant causing the vehicle to overheat and become undrivable. This failure also lead the inoperability of the heating system inside the cabin of the vehicle. The failure of this component is widespread knowledge in the Chevrolet Tahoe/Suburban and GMC Yukon ownership community. In some cases dealerships are purposely marking up the cost of replacement components due to the scarcity caused by this failure and production issue within GM. The only symptoms of this issue were overheating and inoperable cabin heater. No warning lights or messages were displayed.

- Thornton, CA, USA

My truck is a2021 Chevy Tahoe Z71 and my motor knocking real loud I was told it-??s a problem with the lifters My car is not old enough to habe lifter problems It started knocking a year ago I was told change the oil but I always change my oil on time now it-??s way louder than a year ago

- Eight Mile, AL, USA