Automatic fuel management/ Displacement on demand caused lifter failure which caused cylinder failures.

- Casper, WY, USA

I was driving home from a long trip and heard a large pop. Several warning signs and messages began popping up and the vehicle was shaking and struggling to maintain speed. I was able to get home and get my family out of the vehicle and get it to a dealer down the road. They stated the Fuel injector and harness had failed.

- Hartland, MI, USA

[XXX] # [XXX] VIN = [XXX] MAKE ; Chevrolet Tahoe 2021 RE : I received a recall affects certain 2021-2024 models equipped with the 6.2L V8 L87 engine. The defect involves the connecting rod and/or crankshaft engine components, potentially leading to engine damage or failure. On March 2025, My Tohoe completely stopped while I was driving. My SUV was towed to Bomnin Chevrolet in Manassas Virginia. They diagnois was crank shaft damage leading to engine failure. My SUV was in the dealership for 2 weeks while the engine was replaced. I spent a total of $ $15,027.20 to fix my car for that problem. I called GM recall about this problem. I was informed that the recall was for only certain vehicles. Not my SUV. I am concerned that my SUV was affected by faulty crank chaft. I had to replace the engine. Thanks, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Haymarket, VA, USA

several issues with certain popups regarding various indicators on dash and engine not getting enough psi

- Childress, TX, USA

Unknown - engine is driving hard and somethings wrong. No one will service my car because they say it-??s on a recall, but then when they look up the VIN number it-??s not on a recall however there are major issues going on.

- Fayetteville, NY, USA

On April 25th, 2025 while traveling on Interstate 20 at 70+mph speeds with my children in my vehicle and 30 weeks pregnant, with no indication of an issue my 2021 Chevrolet Tahoe suffered catastrophic engine failure. There was zero warning from the vehicle including noises/electronic display warnings that this was fixing to occur. In the middle of going 70+mph surrounded by traffic on a busy interstate the vehicle just shut off completely. I was able to use what momentum I had from my speed to get on to the shoulder. However, the failure prevented me from being able to turn on my signal to alert other drivers of my merging and prevented the use of my emergency flashers to signal once on the shoulder immobile. The vehicle would not start up again after that, and I had to call a tow truck to take my vehicle to the nearest certified Chevrolet service center. When the tow truck arrived the vehicle would not even shift into neutral allowing them to load it without potentially causing more damage. It had to be drug with the wench in park onto the tow truck bed. Once at the nearest service center I was told it would be up to 3 weeks + before they could do a diagnostics. I was 14 hours from home when this happened, and now had to pay to have my Tahoe towed 14 hours back to the service center near my home. On May 8th the failure was determined to be caused by this recall, specifically the crankshaft. The dealership has lied and said they've ordered a new motor and it came in, then called to tell me they ordered the wrong motor. They said they ordered the correct one and it would be in within 14 days, and that was 25 days ago. They called today June 16, 2025 to tell me there is still no update on when my engine will ship to complete this repair. The dealership has also refused to assist me with any loaner vehicle or rental assistance even though GM has told me I am entitled to it under this recall. GM has moved my case to Parts Delay team and I still have not been contacted.

- Meadville, MS, USA

While starting from a stop the engine stuttered and resulted in a major loss of power. Luckily this occurred pulling out of our driveway on to a quiet neighborhood street. Several warning lights and messages went off including the engine and transmission system warning, -??service ESC-??, -??Service Traction Control-??, and the emission system warning. After driving it to the dealership at 30mph since the shaking and banging noise was so bad, the dealer diagnosed it as a cylinder 6 caused by a failed lifter and lifter rod. Resulting repair involved lifters and rods in that same bank at a $3500 repair. The vehicle was just over 4 years old with 79,250 miles.Repair invoice available upon request.

- Clemmons, NC, USA

The contact owns a 2021 Chevrolet Tahoe. The contact stated that upon coming to a complete stop, the vehicle suddenly jolted forward independently. The vehicle returned to normal functionality, but the failure became a regular occurrence. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the valve body. The vehicle was not repaired due to part availability. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 57,000.

- Dayton, TX, USA

-??Catastrophic engine failure-?? as stated by Chevrolet dealership service department. Loud rattling noise prompted service visit. Not 6.2 liter engine, but almost identical issue.

- Cary, NC, USA

Check Engine Light Came On. Upon Diagnosis', the engine is misfiring, lifters are not performing correctly and there are critical engine alerts and an estimate of 11,000 to fix. 2021 - 83,000 miles v8 - 5.3 NOT the 6.2 and no one will help me bc my power train expires. I am the only owner. Second brand new Tahoe ai bought from this dealership and they are doing nothing to help.

- Frisco, TX, USA

On April 25th, 2025 we were taking our kids to their after school activities when the SUV started to shake, and accelerate very fast by barely pushing the gas pedal, the ETS light along with the forward collision warning also appeared on the dashboard along with the check engine light. This prompted my husband to get our vehicle towed to the nearest shop close to the street where our vehicle started having problems. After several days of diagnostics the shop let us know our vehicle needed the following repairs: Bank One lifters replacement, head gasket service, and a water pump replacement, we ok'd the repairs. Although these components were replaced, we were informed on May 15, 2025, that the vehicle continues to misfire and now requires a camshaft replacement as well. The total cost of the repair has now risen from $5,182.16 to $13,549.79, which is a significant financial burden as the vehicle is just outside of warranty coverage. We are aware that there is an active recall covering similar issues for 2021-?"2024 Chevrolet Tahoes equipped with 6.2L engines. However, our 5.3L engine model is experiencing the same mechanical failures, including misfires, knocking noises, low RPM idling, and performance degradation. There is growing evidence that the valve lifter issues are not limited to the 6.2L engine variant. Our experience-?"and the experiences of others reported online-?"suggests that the 5.3L L84 engine may also suffer from the same design or manufacturing flaws. We respectfully urge NHTSA to investigate whether this issue warrants expanding the scope of the existing recall to include the 5.3L engine models, and we ask that GMC/General Motors be encouraged to provide assistance. Given the severity and known pattern of these issues, we believe GMC should cover at least 75% of the repair costs, or ideally, offer to perform the repair at no charge. Thank you for your time and consideration.

- Waldorf, MD, USA

While traveling on the highway one day, my 2021 Chevrolet Tahoe began warning lights on the dashboard. Shortly after, it running roughly, , and jerking, so I pulled over to investigate. There no visible smoke, so I drove to the nearest auto parts store, where they ran a diagnostic test that returned a code of P0306. I then took vehicle back to the dealership where have always received oil changes and repairs. I have never visited any other dealership, relying on certified GM/Chevrolet dealerships. After inspecting the vehicle, they informed me that the lifters needed replacement advised that it would be best to replace the engine entirely. Upon further research, I discovered that issue has been affecting many people in our area and across the United States. This needs to be addressed, as the vehicle is only three years old, purchased brand new with zero miles, and I have not done anything out of the ordinary to cause this problem. The vehicle being 70,000 and 12.000 for repairs is insane.

- Leesburg, GA, USA

My 2021 Tahoe engine light came on 4/26/2025 as well as it began riding rough. Scheduled service on 5/01/2025 which I was informed cost of failure engine diagnosis repair would cost me $5,000 up to $15,000 to repair. My vehicle is basically new and why is my vehicle not included in the engine failure recall? hopefully it is an oversight. As a valued customer please advise, thanking you in advance.

- Southfield, MI, USA

On May 14, 2023 I was on a trip driving the Tahoe (midnight blue Tahoe in the pictures) about 60 mph, on highway 41 (middle of nowhere, no cell reception) south of kettleman city, CA when, without any warning or symptoms of any problem whatsoever, the engine lost propulsion and died. I was able to coast onto the shoulder and tried starting it. It started again and I continued driving and about 35 minutes later I stopped at a red light on Highway 41 in Lemoore, CA. Again the Tahoe engine died without warning and would not restart. When I tried starting it I could smell a burning smell. The engine cranked but wouldn-??t start, and then the check engine light came on. I was at a stoplight on a major highway and was unable to move the vehicle, and was scared to sit in it, so I put on the vehicle hazard lights, got out of the car and ran to the side of the road for safety. Luckily I did not have my children with me. I called 911 and a police officer came and parked behind my vehicle with his lights on so hopefully no other vehicles would hit it. A tow truck was immediately dispatched as high priority by the police. I had it towed to Hedricks Chevrolet dealership in Clovis, California, who informed me there was metal parts in the oil and that the engine was destroyed and had to be replaced. It took several months to get the engine replaced and in the meantime, I bought a new 2023 Cadillac Escalade so I would have a vehicle to drive. The Cadillac Escalade ended up having an extremely similar problem (and I will file a separate report for that vehicle). A few months later when the Tahoe replacement engine was installed I picked up the Tahoe from the dealership and sold it to Carmax.

- Clovis, CA, USA

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed, there was a loud revving and knocking sound coming from the engine compartment. The contact stated that later after starting the vehicle, the check engine warning light illuminated with the knocking sound coming from the engine. The vehicle was driven to the local dealer who diagnosed that the engine was faulty and needed to be replaced. The engine was replaced, and the vehicle was repaired. The manufacturer was notified of the failure. The contact was informed that the VIN was not included in NHTSA Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 70,000.

- West Memphis, AR, USA

Sudden engine failure while driving. Was able to pull to the side of the road with a few hundred feet. Repair required full engine replacement. Have to other friends that drive similar gm products that also experience engine failure with 3 weeks of our incident.

- Mooresville , NC, USA

Engine burning through oil excessively. Has been noted on multiple occasions and requires early changes and top off. Is also happening with 3 friends with the same make and model with the 6.2L. No warnings but was informed it is common at shop.

- New Braunfels, TX, USA

We had a failed lifter that caused bent rods which caused scratches on the crank shaft which caused us to have to replace the engine. After a simple internet search I have found the lifter failure is very common with gms 5.3 v8. We were told oil needs to be changed at least every 5000 miles although the vehicle prompts you around 7000.

- Norman, OK, USA

Traction control light came on and the vehicle felt like it was going to die/low idle. I took to dealership on 9/13/22 (5months after getting vehicle) and the codes P03000 00 which is an engine misfire, P050D 00 which is cold start rough idle and it was noted by service tech that engine making a clunk and ticking noise. There was a misfire on cylinder 6. They removed the valve cover and the intake valve rocker arm was not moving at all and when the rocker arm was removed they noticed the push rod was also bent. They verified the DFM lifter was collapsed.

- Woodland , CA, USA

I was driving along the highway at 11pm when I the vehicle started shaking and I heard strange sounds coming from outside the vehicle. I pulled over to inspect and realized it was coming from the engine bay. The engine was making knocking, rattling, and belt slipping noises and the entire vehicle was shaking and the engine also stuttering. I was able to drive the vehicle to a nearby plaza where I had it towed the following morning. There were no warning signs, the vehicle ran properly up until this occurred. The dealership inspected it and told me the engine needs to be replaced and it was likely that a rod bearing that went bad. This happened nearly 2 months ago and I am still waiting for a new engine.

- Palm Beach Gardens, FL, USA