2021 Chevrolet Tahoe Engine Problems

While driving 80 mph on the interstate, your Tahoe's engine revved to 4000 RPM with rhythmic vibrations, then shifted into Neutral and shut off completely. The dealership diagnosed this as a loss of propulsion requiring a full engine replacement. This happened at 104,000 miles.

Your engine shut off unexpectedly while driving on the highway at 75 mph and wouldn't restart. After the dealership replaced the battery at significant cost without finding the root cause, your engine suffered a catastrophic internal failure (threw a rod) the next day at highway speed. This suggests the initial shutdown may have been a symptom of a deeper engine problem rather than a battery issue.

Your engine is consuming oil much faster than normal, and you're hearing abnormal knocking sounds from the engine. You may also notice the engine hesitates during acceleration, blue smoke coming from the exhaust, and your check engine light turning on and off. A dealer inspection found metal shavings in your oil, which indicates internal engine damage that typically requires a complete engine replacement.

Your 2021 Tahoe's engine developed a knocking sound while driving, along with a check engine warning light. A mechanic discovered a bent engine rod, indicating engine failure at 72,000 miles. This issue is linked to a known manufacturer recall, and the manufacturer has agreed to cover half the cost of engine replacement. The repair will likely involve removing and replacing the entire engine.

Your 2021 Chevrolet Tahoe's engine suddenly seized while you were driving on the highway, causing a loud clunk and complete power loss. The engine won't crank or start, and the dealership confirmed this is part of a known recall issue affecting 5.3L V8 engines due to defective connecting rods or crankshaft problems — but your vehicle's VIN wasn't included in the recall despite having the same year, model, engine, and problem. The issue will require engine repair or replacement, which should be covered under the recall.

While driving slowly to a stop sign, your engine suddenly made a loud clunking noise and the vehicle abruptly stopped without warning. Multiple dashboard warning lights came on immediately, and you heard knocking sounds coming from the engine. Your vehicle won't operate normally and the sudden failure created a safety risk, especially since you were driving at night with children in the car. The engine may need professional inspection to diagnose internal damage, which could require significant repairs or engine replacement.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while his wife was driving out of the driveway and driving approximately 20 MPH, the driver became aware of an abnormal flapping sound that became louder as the vehicle accelerated. Additionally, the contact stated while his wife was driving approximately 60-65 MPH on another occasion, the check engine warning light illuminated. The driver pulled over to the side of the road. The vehicle was towed to the residence, where a mobile independent mechanic diagnosed the vehicle with a misfire in cylinder #8. The mechanic determined that both sides of the engine lifters, the gaskets, and other unknown parts needed to be replaced. The vehicle was not repaired due to the cost. The dealer and the manufacturer were not contacted. The vehicle warranty company was contacted and informed the contact that the vehicle was not covered under warranty. The failure mileage was approximately 93,000.

1ST ISSUE: 9/2025, after driving from another city to my home at 55-75 mph. As I pulled up home, the car just stalled and wouldn't start. I googled issue to find out it was a commonly known issue by GM. If fuel pump control module had happened while driving faster and not on my street to roll up to curb. I would have or could have been deadly. I find out what part # and local dealer knew there was a recall but told me he never heard about it and charged me for part. I installed in front of home on street and have been trying to get money back after reporting to GM I repaired my fuel pump control module and have been trying to get my money back from a repair done on 9/29/2025 by me. GM says it's looking into still after I keep calling them on status of this notice. I still have old part. I have filled out all reimbursement forms.1st the danger of it failing and now no money. By the time engine light comes on you have no power for any stopping or steering. #2 engine 2021 Tahoe High Country 6.2 L V8: NO RECALL HAS BEEN SENT. GM has known about an engine that has multiple failure issues that could GET YOU IN A SERIOUS ACCIDENT/death BY JUST STOP RUNNING, while just driving at any moment, INTERNAL FAILURES and main seal leaks, MORE! Mine just poured oil out on driveway after driving 6 miles to church and back. this will be the largest and most deadly auto issue in history. They even had dealers now with any on lot with this engine a stop sale order. aprox. 800,000 of these engines are out there, Local GM dealer says THERE IS NO RECALL. 2021 TO 2026 and they have only changed out aprox. 2800 engines and telling me mine sitting in driveway is not on recall. BS. these engines are in their high-end trucks, SUV's, Escalades. Someone needs to get Gm to do what's right and replace with new engines. That have been tested, all issues before someone has to die. Trying to keep silent on internet is sad. Yes its going to cost billions. But to keep customers safe and not scared.

The vehicle stalled while driving down the road and started making a loud ticking noise, the engine light went on. It was brough to the dealership where they did an engine rebuild. They replaced 16 lifters and camshaft, a pulley belt and gaskets. The vehicle was picked up, however, a month later the oil low add oil light came on and the oil tank was more than 2.5 quarts low indicating extreme burning of oil. The vehicle is shuttering on acceleration of low RPMs. Brought it back to the dealership and awaiting further instruction. It caused a major safety concern because it has the potential to stall due to a motor defect on a major highway, putting my family and possibly others at risk of harm or death.

Lost Power. Engine went into a limp mode. Engine starting knocking loudly and service esc came up on dash along with check engine light. Took it to the dealer and they said a lifter spun and damaged the camshaft. Dealer says it’s not covered by recall. Vehicle has been in Chevy dealer garage for 2 weeks and no repair yet.

While driving normally, the vehicle developed engine performance issues and was diagnosed with a catastrophic camshaft failure at approximately 85,000 miles. The vehicle has received regular oil changes with full documentation and has not been abused or neglected. A licensed mechanic confirmed that the camshaft was severely worn and damaged, consistent with AFM/DFM lifter failure, which is a known issue on GM V8 engines. This failure caused significant internal engine damage requiring major repair. The failed camshaft has been retained as physical evidence. A camshaft should not fail prematurely under proper maintenance. This appears to be a manufacturing or design defect, not normal wear and tear, and presents a potential safety concern due to sudden loss of engine power.

2021 Chevy Tahoe RST. Bad lifter valve, warranty not wanting to cover replacement for new one.

2021 Tahoe with l87 engine lifters failed at 2000 miles ,was fixed by dealer then at 82,000 miles same failure only now engine failed, I was driving home when it failed almost got in an accident lost power engine codes were blinking , took to dealer been there since October 20th still at dealership

I was driving on the highway at approximately 35mph when I noticed there was no response from the accelerator. I shifted the vehicle into neutral and coasted onto a side road and call OnStar for assistance. The dashboard indicator said to restart engine. I attempted to restart, but the engine would crank but not turn over (start). The vehicle was towed to the dealership where the fuel pump assembly was found to have failed and need replacement.

Having to replace the radiator due to it leaking around a plastic connection to metal. Was told by the dealership this has an updated part from GM due to it being a known issue.

1. What component or system failed or malfunctioned, and is it available for inspection upon request? Answer: The vehicle’s 6.2L L87 V8 engine suffered a sudden internal mechanical failure involving the connecting rod, rod bearings, and crankshaft assembly, resulting in catastrophic engine damage. The failure mode is consistent with the defect described in GM Recall N252494001. The engine and all damaged components are fully available for inspection upon request. 2. How was your safety or the safety of others put at risk? Answer: The engine failed without warning while the vehicle was in motion, causing an immediate loss of propulsion. This created a hazardous situation where the vehicle could no longer accelerate or maintain speed in traffic, increasing the risk of a rear-end collision or loss of vehicle control. GM’s own recall documentation identifies this exact failure mode as a significant crash risk, and that same hazard occurred in my case. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? Answer: Yes. A service technician confirmed catastrophic internal engine failure consistent with connecting-rod or crankshaft damage. The dealer also verified that the engine is inoperable and requires full replacement. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Answer: No, the engine failed while in motion and was taken to the closest mechanic. Inspections by an insurance representative or manufacturer representative can be arranged. The vehicle and damaged engine remain available for further examination. 5. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Answer: No. There were no warning lamps, diagnostic messages, or drivability symptoms prior to the catastrophic engine failure. The failure occurred suddenly and without any advance indication. All service records are available

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at 70 MPH, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The message “Service Electronic Stability Control" was displayed, and the traction control warning light and the check engine warning light were illuminated. The failure persisted while driving, and the vehicle failed to exceed 50 MPH. The vehicle was taken to an independent mechanic who diagnosed that the lifters had failed, the camshaft had failed, and there was a misfire in cylinder #5. The vehicle was not repaired. The vehicle was towed to the residence and had not been driven since. The manufacturer was not notified of the failure. The failure mileage was approximately 143,000.

I am submitting this complaint to the National Highway Traffic Safety Administration (NHTSA) regarding a sudden engine failure in my 2021 Chevrolet Tahoe equipped with a 6.2L V8 engine, which posed a serious safety risk. I was driving on the highway at approximately 65 mph with cruise control engaged. Suddenly, the vehicle lost all power, disengaging the cruise control, and the check engine light began flashing rapidly. I managed to exit the highway safely. While stopped at a traffic light, preparing to turn into a nearby repair shop, the car started shaking violently from side to side, making it difficult to control. I took the vehicle to a Firestone shop and a local Chevrolet dealer, both of which diagnosed massive engine failure and indicated that the engine will most likely need to be replaced. The symptoms I experienced—sudden loss of power at highway speeds, flashing check engine light, and violent shaking—are in line with issues reported in other GM 6.2L engines that have been recalled.  For whatever reason, my 2021 Tahoe, which falls in the middle of the affected model years for these recalls (e.g., GM recall N252494001 for 2021-2024 vehicles with 6.2L V8 engines due to defects in connecting rods and crankshafts leading to engine damage and loss of propulsion), is not included under the broader GM 6.2L engine recall,  although I experienced very similar issues. The biggest safety concern was the engine essentially losing power at highway speeds, which could have led to a crash. I urge NHTSA to investigate and expand coverage if necessary to ensure public safety.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed, several unknown warning lights illuminated. In addition, the contact noticed an abnormal ticking sound. The vehicle was towed to an independent mechanic, where the vehicle was diagnosed with a misfire in cylinder #7. The independent mechanic checked the spark plugs and other unknown parts for failure; however, there was no evidence of a failure. The contact was informed of a valve lifter failure. The contact was informed that the valve lifter and possibly the push rods and camshaft needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure but provided no assistance. The contact referenced Technical Service Bulletin: N212353840; however, the VIN was not included. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 87,893.

We have experienced a loss in power that is accompanied with an audible engine knocking sound. The loss of power affected our ability to safely merge into the highway.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while his wife was driving at undisclosed speeds, there was an abnormal ticking sound coming from the vehicle. The check engine warning light was illuminated. The vehicle was taken to the local dealer, where it was diagnosed, and determined that the cylinder #1 left side lifters and push rod had collapsed. The lifters and push rod assembly were replaced. The contact stated that on a separate occasion, while driving at undisclosed speeds, there was an abnormal ticking sound coming from the vehicle, and the check engine warning light illuminated. The vehicle was taken to the local dealer, where it was diagnosed, and determined that cylinder #4 lifters had detached, and the push rod was bent. The vehicle was repaired. The contact stated that the engine was consuming an excessive amount of engine oil. The contact related the failure to TSB: 15-06-01-002A. The dealer and manufacturer were not made aware of the failure. The failure mileage was approximately 12,400.

Driving car, suddenly when accelerating engine light started flashing, car was shaking and making knocking noise

2021 to 2024 has had countless problems with the 6.2l engine. General Motors has put a stop of sale on vehicles with this engine. When I purchased the car the wrong oil was in the car which always burned off with 2 months after an oil change. They figured out the right oil but the damage has already been done.

The contact owns a 2021 Chevrolet Tahoe. The contact received notification of NHTSA Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING). The contact stated that the dealer was contacted; however, the contact was informed that parts were not yet available. The vehicle was not repaired. The manufacturer was contacted about parts availability. The contact had not experienced a failure.

The contact owns a 2021 Chevrolet Tahoe. While driving 25 MPH, the vehicle stalled in the street. The vehicle was eventually restarted and was driven to the family’s residence. After arriving at the residence, the vehicle failed to restart. The contact stated that the failure was like the failure in NHTSA Campaign Number 25V274000 (Engine and Engine Cooling). There were no warning lights illuminated. The contact called the local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was contacted and referred the contact to the NHTSA Hotline for assistance. The approximate failure mileage was 73,000.

The contact owns a 2021 Chevrolet Tahoe. The contact stated while driving at an undisclosed speed, the vehicle made an abnormal ticking and knocking sound. The check engine warning light was illuminated. The contact was able to drive to the nearby dealer, where the vehicle was diagnosed based on the abnormal sounds. The dealer determined that the failure was related to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the VIN was not included. The vehicle was not repaired. The contact was referred to the manufacturer for assistance. The manufacturer was contacted and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 187,000.

Leaving the stoplight, all the sudden the dash read service ECM in the motor started clanking. Took it to the dealership where they told me the cam and lifters were bad and said we might as well get a new motor $17,000. And not approved by extended warranty, crooks.

Engine starting banging loudly and misfiring. There was a loss of power and engine codes. Brought to the dealer and they said cylinder #4 was misfiring due to a stuck lifter, bent push rod and destoyed cam. Total cost of repair was $9200. Vehicle is less than 4 years old an has 75,000 miles on it.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at various speeds, the vehicle jerked and failed to accelerate as intended while depressing the accelerator pedal. The contact was able to pull over to the side of the road before the vehicle stalled. The check engine warning light was illuminated. The vehicle was towed to a dealer; however, the vehicle was not diagnosed or repaired. The vehicle was then towed to the residence. The vehicle was again towed to the dealer, where it was diagnosed, and determined that an engine valve had failed, and the lifter lock pin spring had failed, which caused the engine to misfire and engine failure. The contact was informed that the engine needed to be replaced. The vehicle remained at the dealer unrepaired due to the cost. The contact related the failure to NHTSA Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING); however, the VIN was not included. The contact stated that the first year the vehicle was purchased the vehicle failed to restart, and several attempts were needed to start the vehicle. The vehicle was taken to the dealer. The contact stated that an unknown electrical system repair was performed. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was unknown.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while his wife was attempting to start the vehicle, the engine failed to turn over as intended. No warning light was illuminated. Upon further inspection, the contact stated that there was an abnormal sound coming from the vehicle. The contact used an OBD-2 diagnostic scanner and retrieved DTC: P129F and U18A2. The vehicle was towed to a local dealer, where it remained for further investigation. The contact related the failure to an unknown recall; however, the VIN was not under recall. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 82,000.

I am submitting this complaint regarding my 2021 Chevrolet Tahoe (VIN: [XXX] ) which has developed a severe transmission shudder at both low and highway speeds. The issue has been confirmed by my Chevrolet dealer, who provided an estimate of $5,492.18 for torque converter and valve body replacement. This failure is identical to the torque converter shudder problem documented in GM service bulletins and special coverage adjustments for other GM vehicles of the same make, model, and model year. However, my VIN is not currently included in those programs, leaving me without coverage despite experiencing the exact same defect. I believe this condition poses a serious safety risk, as the shudder occurs while driving at highway speeds, causing vibration, hesitation, and potential loss of control. These symptoms could lead to accidents if the vehicle fails to respond properly during acceleration or lane changes. Given that this appears to be a widespread defect affecting multiple GM vehicles, I respectfully request that NHTSA investigate and consider expanding any related recall or special coverage programs to include affected VINs such as mine. Please let me know if further documentation, service records, or dealer estimates are needed to support my complaint. Thank you for your time and for working to ensure vehicle safety. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at approximately 40 MPH and accelerating to merge onto a highway, the check engine warning light started flashing. Additionally, the contact stated that there was an abnormal clunking sound coming from underneath the floorboard and coming from the engine compartment. The contact pulled over and stopped the vehicle. The vehicle was towed to the dealer, where it was diagnosed and determined that lifter #6 had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and informed the contact that it was a known failure, and the contact was offered monetary assistance. The contact was also referred to the NHTSA Hotline for assistance. The failure mileage was approximately 61,000.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving on two occasions at various speeds, the vehicle stalled. There were no warning lights illuminated. The vehicle was not able to restart. The vehicle was towed a dealer where it was diagnosed that he fuel control module needed to be replaced. The vehicle was repaired, but the failure reoccurred approximately 10 months later. The manufacturer was not notified of the failure. The failure mileage was approximately 67,438.

Lifter failure and camshaft failure. Found metal in engine oil that has caused bearing failure and engine damage. While driving the Tahoe on [XXX] I experience a jolt on the front right side. Then warning messages regarding the Traction Control and to Service the ESC appeared. As I cleared those messages my engine light was blinking and several other dash lights were lit up. There was a knocking sound. I contacted the dealership (Coyle Chevrolet in Clarksville, IN) and they sent a tow truck to bring it in. They assumed it would be in the recall but it is not. I am without a vehicle and the engine is backordered. It's not right that GM is picking which engines they are going to include in the recall when they know there is a manufacturing issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

My 2021 Tahoe High Country began to make unrecognizable sounds and the orange engine light started blinking. I immediately pulled over and turned the vehicle off. I was made aware that numerous 2021-2024 V8 6.2L engines are affected. I am waiting for my VIN to be selected in some sort of lottery format to qualify for a fix. I was told by a Chevy Service Technician that it can take 2 weeks or 2 years for GM to find a “remedy”. Unacceptable and very expensive to rent a vehicle for work until GM decides to “remedy” my situation. I truly hope they provide me with a solution soon.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at various speeds, the vehicle lost power and shut off unexpectedly. The contact stated that several attempts were needed to restart the vehicle to continue driving. The check engine warning light was illuminated during the failure. The vehicle made an abnormal ticking sound while idling. The vehicle was taken to the dealer but was not diagnosed or repaired. The manufacturer was made aware of the failure and confirmed that the VIN was not under recall. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was 24,971.

I was driving down I-635 (Dallas) at 70mph on Friday 7/25 when my Tahoe started shaking, knocking and had complete engine failure. I managed to regain control and slow to the service road. Thankfully the car next to me was paying attention & swerved to avoid me, but honked at me the entire time. The vehicle was towed and we are being told we need to replace the engine for $14,500. As I’ve researched, the 6.2L is recalled for this exact issue. The 5.3L has no current recall but I’m clearly experiencing the same engine failure and being told I’m responsible for it. I had no prior warnings & have regularly maintained this vehicle. Any chance others have complained about the 5.3L as well & our Tahoe’s should be included in this recall?

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving approximately 70 MPH the vehicle stalled. The vehicle was towed to the local dealer who diagnosed the vehicle and determined that the engine had seized and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure. The contact was informed that the VIN was included in the NHTSA Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING). The contact indicated that the vehicle had experienced the failure listed in the recall. The failure mileage was 47,000. The VIN was invalid.

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

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.

[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)

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

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.

The contact owned a 2021 Chevrolet Tahoe. The contact stated while driving approximately 60 MPH, the check engine warning light illuminated, and the vehicle started losing motive power. The contact stated there was an abnormal ticking sound coming from the engine compartment. The contact stated that the vehicle slowed to approximately 10 MPH with black smoke coming from the exhaust pipe. The contact was able to drive the vehicle to a dealer. The dealer diagnosed the vehicle and determined that the engine connecting rods had failed and needed to be replaced. The contact researched online and related the failure to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the VIN was not included in the recall. The vehicle was repaired. The manufacturer was informed of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 85,000.

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.

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.

“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.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while her husband was driving 40 MPH, the "Service Stabili-trak Soon" message was displayed on the instrument panel. The contact stated that there was an abnormal knocking sound coming from the engine and the contact's husband pulled over and restarted the vehicle. The contact stated that after the vehicle was restarted, the failure persisted. The contact's husband pulled into a gas station and called an independent mechanic. The mechanic advised the contact's husband to safely drive the vehicle home and to then take the vehicle to his shop the next day for a diagnostic test. The vehicle was driven to the independent mechanic and was diagnosed, and the contact was informed that cylinders #1 and #7 were not functioning as needed. The contact was then informed that the engine lifters needed to be repaired. The manufacturer was notified of the failure and parts were ordered to repair the vehicle. The vehicle remained in the possession of the mechanic and was not yet repaired. The failure mileage was approximately 75,400.

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.

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.

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.

The contact owns a 2021 Chevrolet Tahoe. The contact stated while driving 70 MPH, the check engine warning light and other unknown warning lights illuminated. The message "Loss of Oil Pressure" was displayed, and the vehicle made an abnormally loud banging sound. The contact was able to continue driving at slow speeds with the hazard lights engaged. The contact drove to the dealer, where he was employed. The dealer diagnosed that the engine lifters had failed. The vehicle was then towed to the Chevrolet dealer, where it was diagnosed that the lifters had failed. The dealer provided an estimated fee for the repair. The vehicle was towed to Redline Performance LLC, where it was diagnosed that there were metal shavings in the oil pump, camshaft, and in other unknown parts, along with the lifters failure. The mechanic replaced the lifters, the connecting rod, the camshaft, the oil pump, and other unknown parts; however, the failure recurred after picking up and driving the vehicle to the residence. Additionally, there was smoke coming from the engine. The vehicle was towed to Stan McNabb Chevrolet Columbia (101 S James Campbell Blvd, Columbia, TN 38401), who informed the contact that the vehicle would not be diagnosed by the dealer. The contact became aware that the VIN was included in NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling), which the contact related to the failure; however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 66,000. VIN tool confirms parts not available.

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.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while her husband was driving at an undisclosed speed, several unknown warning lights illuminated, and the engine made knocking sounds. The message "Service Transmission" was displayed. The contact's husband pulled over and turned off the vehicle. The vehicle failed to restart immediately. The vehicle was taken to the dealer, who replaced the camshaft retainer, valve tensioner kit, gaskets, seals, lifters, engine bolts, rods, and pipes; however, the "Service Transmission" message displayed again while driving. The dealer was made aware of the failure, but the vehicle was not yet diagnosed or repaired. The manufacturer was made aware of the failure but informed the contact that there was no recall associated with the VIN. The failure mileage was approximately 89,678.

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.

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.

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.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving 15 MPH, the vehicle lost automotive power and stalled. The contact stated that several unknown warning lights were illuminated. The vehicle was towed to the dealer but was not diagnosed or repaired. The contact called the local dealer and was informed that there were no associated recalls. VIN tool search showed: NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling). The manufacturer was not notified of the failure. The failure mileage was approximately 10,440.

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.

2nd glow plug failure

After I washed my 2021 Chevrolet Tahoe, I went to run some errands. As I pushed the start button, the car would try to start but did not. I tried several times without success. I had the truck towed to Ed Morse Chevrolet in Sunrise, Florida. My odometer is at approximately 43,000 miles. About 3-4 months ago, at 42,000 miles, I had the same situation. I had to have the truck towed to Ed Morse. At the time, the Service Writer told me it was probably the fuel cell module and that Chevy has been a problem with them. The Service Writer surprisingly admitted that this issue could cause the truck to stop in the middle of your commute! I told him that an issue this serious needs a recall. So, today, when AAA picked up my truck, he said that this happens frequently and he towed many Chevrolet Tahoes and pickup trucks with this issue. The AAA technician even reiterated that the fuel cell modular failure shuts down your vehicle while driving! This is insane and troubling. Within 1000 miles, I will need 2 fuel cell modules and there is no guarantee that this one will last. Thanks [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Driving on a highway to Dallas and vehicle loss power and locked up in the middle of the highway.Was stranded on the highway for 4 hours. Vehicle would not start up and had to get towed to local dealership. Dealership diagnose the problem and stated that the engine has failed. I got the vehicle towed back home to my local dealership and they confirmed that the engine has failed. The vehicle showed no signs of engine issues. GM needs to recall this vehicle.

Approximately 4/14/24 while I was driving home from being out of town with my child the check engine light came on with a message “Reduced acceleration drive with care.” The car was not shifting and I couldn’t go over 45 mph and the rpm’s were about 3000 at that speed. The light went off and the car seemed to be driving normally. While on the interstate traveling at approximately 70 mph the car did a hard shift and drastically slowed while the rpm’s spiked. I took it to the dealership who determined the valve body needed to be replaced. Approximately August 2024 it happened again but the light went off. December 2024 same issues with the check engine light, reduced acceleration and not shifting happened. Took the car back 12/9/24 where a wire was replaced. Picked the car up 12/12/24 and 12/18/24 while driving in the car rider line picking my child up the car had a hard shift, check engine light came on, reduced acceleration message and the car would not shift. Notified the dealership immediately and took it back 12/26/24 where they did a second valve body replacement. 1/28/25 on my way home from running errands and was stopped at a red light and the car shifted hard, check engine light came on, reduced acceleration message and engine would not shift causing me to drive slowly to get home (40 mph or less). Dealership was notified immediately and took in the following day. Dealership had a week and had me pick it up because they “couldn’t replicate the issue.” 2/15/25 after driving 2 hours we pulled in a parking lot and the car shifted hard hard, check engine light came on, reduced acceleration and would not go into reverse. The dealership picked the car up and have had it since trying to replicate it. It occurs without warning while driving and will drastically slows the car down putting us a risk of being rear ended due to the rapid and speed change. It also is a safety risk due to lack of warning that a power failure is about to occur while driving.

Engine knocking while accelerating. Told by Chevy dealership that a thruster is broken. Car is only 4 years old with 60k miles. Unfortunately, not under warranty. Quoted $5,000 for fix. No errors on dash or visuals of the problem.

At 35,000 miles, my 2021 Chevrolet Tahoe started to misfire. When I pressed the accelerator, the truck started hesitating and the check engine light started flashing. I was able to get the truck to the dealer I purchased it at. The technician "claimed" it was a bad fuel injector. The dealer replaced the spark plug and injector. The vehicle was never test driven. I picked up the truck and drove it on the road. Within 1 mile, the truck started to misfire again with the check engine light started flashing. The dealer claimed that the lifter or lifters in one engine bank were bad. The dealer replaced the lifters on the one side of the engine.

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.

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.

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.

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.

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.

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

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)

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.

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.

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.

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.

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.

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.

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

On Wednesday,Sept20 2023 I was traveling eastbound in the passing Lane on interstate 90 in New York when my Chevy tahoes motor began shaking violently, chugging, and losing power. The check engine light illuminated. The engine stalled as I frantically tried to move to the berm. There is a lot of large semi traffic on that road and I had a difficult time maneuvering safely without power to get onto the side of the road. I was unable to move completely into what I felt to be a safe area. I continued to try to start the motor after about 10 minutes I was finally able to get it started and move it to an exit where it was towed to community Chevrolet in Meadville Pennsylvania. The Chevy dealer at this point has told me it is a fuel pump problem and they are on back order and there is a strike by the auto workers. They are unsure as to when I can have this problem remedied with the parts that are needed.

Wife was driving home from work, vehicle started with no issues and she did not notice anything abnormal as she started her commute home, roughly 20 minute commute. She noticed the vehicle was vibrating, mildly at first and progressively getting worse. When she came to a stop at red light, she noticed the vibrating was worse at idle. She did not note any warning or cautions, she contacted me, i advised her to attempt to make it home. Once the light turned green, she accelerated and noticed the vehicle smoking, she pulled over into a parking lot, parked and shut it off. By this time all the warning in vehicle were flashing, battery and oil pressure gauges were fluctuating, check engine light was flashing, traction control, and other adaptive sensors i.e. blind spot, HUD where signals were displayed as off or not functioning. I was able to drive the vehicle to .4 miles to the dealership service center where we purchased the vehicle from in 2021 brand new off the lot. This occurred on 6 September 2023, still awaiting final diagnostic from from service department. They think its the lifter on the engine that failed, but they have disassemble engine to make exact determination. Once I receive diagnostic/invoice details I can provide that, luckily vehicle is still under warranty.

The contact owns a 2021 Chevrolet Tahoe. The contact stated while driving 55 MPH, the vehicle stalled. The contact was unable to restart the vehicle. The vehicle was towed to a dealer where it was diagnosed and determined that the fuel pump needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 43,000.

I was driving down the highway and my car simply stopped moving, pressed on the gas and nothing. Had it towed and the dealership said it was the fuel pump power control module which there was a recall on but I never received it. I was in a very dangerous situation and I am not happy.

The contact owns a 2021 Chevrolet Tahoe. The contact stated while driving at various speeds, the check engine warning light illuminated, and the vehicle shuddered. The vehicle had been taken to a dealer on two separate occasions where the check engine warning light was reset; however, the failure recurred. The manufacturer was notified of the failure and the contact was informed that the VIN was not under recall. The vehicle was not repaired. The failure mileage was approximately 40,000.

The suit also says the lifters in affected engines were installed in an incorrect position in the lifter guide and do not always conform to design specifications. Plaintiffs claim their vehicles needed frequent valvetrain maintenance, including “more frequent oil changes, engine flushing and cleaning and/or replacing the valve lifter oil manifold and its filter at regular intervals.”

I bought the vehicle (a Chevy Tahoe) brand new in 2021. After 7,000 miles the lifter in the motor broke. The top of the motor had to be rebuilt to accommodate a new lifter. Now, with 24,000 miles on the vehicle, another lifter just broke, so the motor has to be taken apart again. I am certain GM knows about this problem, as (the lifter issue) it is all over the internet, but GM will not issue a recall of the defective lifters. I would be very interested in joining a class action law suit to force GM to recall the defective (lifter) parts. In both instances when the lifters broke, there is no warning! The engine looses power and the vehicle "bucks and shakes". It is just a matter of time before this issues causes sever bodily harm because of this massive engine failure. I have all of the repair documentation.

The contact owns a 2021 Chevrolet Tahoe. The contact stated while driving 35 MPH, there was a loud knocking sound coming from the vehicle and the vehicle was shaking abnormally. The contact stated that the check engine warning light was illuminated. The vehicle was taken to the dealer for diagnostic testing and the contact was made aware of a cylinder #3 misfire which caused the lifters to fail. The contact stated that the lifters on the driver’s side and the gaskets, bolts, and rods were replaced; however, the failure recurred. The manufacture was not contacted or notified of the failure. The failure mileage was 16,786.

The lifters failed at 18,000 miles stranded on the side of the road with 3 kids for hours. Only one side is apparently being replaced, leaving me just waiting for the other to go out. I was assured by the dealership that it would happen just would be a matter of when

Experienced a collapsed lifter on my 2021 Chevy Tahoe at 18,000 miles,also had a bent push rod, all whiling 40 mph. This is my second time having this issue. There is a problematic design with the active fuel management system. The frequency this is occurring is unacceptable. I also had the same issue on another GM truck at 120k miles which costs 6,000 dollars to repair.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that stated while the vehicle was parked and unoccupied caught fire without warning. The contact noticed there was smoke and flames emerging from the vehicle, and it burnt to the ground. There were no reported injuries. The contact's belongings purse and wallet were destroyed in the fire. The fire department extinguished the fire. A police report was not filed. The contact called the local dealer but the vehicle was not diagnosed or repaired. The manufacturer was contacted but, no further assistance was provided. The vehicle was towed to a salvage investigation lot by the insurance company. The approximate failure mileage 10,000.

This model engine stalls/cuts out acceleration because of valve lifter problems. While Chevrolet has repaired many of these engines, they are waiting until the check engine light comes on (or flashes) to initiate the warranty repair. It is very possible to be miles from a dealer, requiring a tow, and the dealer not having the repair parts in stock.

GM has been building V8 engines with a known defect that is bending push rods and damaging lifters. These newer engines use a DFM system and that system is compounding this engine defect. GM has refused to replace all the lifters and is going forward with just fixing engines as they blow up which can happen at any time. The 5.3 and 6.2 engines are a ticking time bomb and can leave you without engine power at any given time when a lifter fails or a push rod gets bent. Hopefully the NHTSA will look into this issue and force GM into a recall.

I have has this vehicle for just over a year, and in the time i have accumulated 8,600 miles. Suddenly, yesterday after normal I stopped for a red light. The start/stop function came on (normally) and then all of a sudden the vehicle restarted it self, but, it started running rough, and misfiring. when i moved it backfired several time. I had to have the car flat bedded to the dealer, and apparently it has a known issue, with the lifters and the push rods. The dealer stated it will take a while to get the parts. h as 5 others in the shop for the same problem. My comment is, I am lucky this happened at a stop, I think this would be a major issue if this was to happened at 65 MPH ? You could end up in an accident while you deal with the issue.

Valve lifter damaged. Caused poor engine performance and lack of acceleration. Vehicle at dealer, who is very aware of this issue with GM V8 engines. Replacement parts on multi-week back-order. Check engine and other warning lights appear, as well as audible noises from engine compartment. Symptoms appeared on 10/8/21. 9,000 on vehicle

The contact owns a 2021 Chevrolet Tahoe. The contact stated while driving approximately 45-50 MPH, the vehicle stalled with the check engine warning light flashing. The vehicle was towed to the contact's residence. The vehicle was then towed to the local dealer but was not diagnosed or repaired. The manufacturer was notified of the failure however, no further assistance was provided. The failure mileage was 14,170.

The engine started knocking and running rough. My wife pulled the car over. She could tell from the sound it was not a minor issue. We had the 2021 Tahoe toed to Vaden Chevrolet in Beaufort, SC, where we purchased the vehicle. The dealer confirmed it was an engine problem. 8 lifters along with other associated parts need to be replace. This is a major engine repair. The vehicle is 8 months old and has approximately 10,000 miles on it. Doing internet search, the failure of engine lifters in Tahoes and Silverados appears to be a known problem. The service department manager told me that they have already done 10 of these this year. Failure of an engine while driving is a major safety issue. The vehicle is in for repair, now.

On July 3, 2021 approximately 2:00pm EST. Left to go out of town, had driven about 50 miles. Stopped to top off fuel. Left station for fueling stopped at red light to turn left to get back on interstate. The vehicle stuttered, stalled, and would not restart in middle of intersection. Hazard lights put on nearly hit by other vehicles. State trooper had to get behind vehicle to let other know of hazard. Towed to nearest dealer. Onstar diagnostic revealed fuel management system and transmission. Dealer hasn’t contacted but service advisor from GM notified me it was fuel pump.

On my way to work a few days ago I noticed a lag while driving and a knocking feeling/sound ever few seconds going highway speeds. No engine light came on to warn or tell of an issue. I thought maybe it was just a section of roadway that makes cars ride rough. Anyway, made it to work and I could hear a whining sound every time I gave vehicle gas and RPMs increased. We called our GM dealer and he said it’s a known issue of collapsing lifters and to bring it in for repair. Vehicle had around 5900 miles. 20% oil life was left. I checked oil and level was fine. I’m in a loaner now waiting for repair. If it’s a known issue, why is it happening. Inferior parts or bad design? A recall needs to happen before someone gets hurt.

We purchased this vehicle on 11/28/20, and on 12/10/20 began receiving multiple error messages and loss of power on the accelerator. Shortly after the error messages began I was no longer to even start the vehicle. It needed to be towed to the dealer and eventually required a full engine replacement, and was out of service for 22 days. On 5/19/21 I was getting on the highway with my wife and 3 young children and began receiving many of the same error messages. The car was brought to the dealership the following day and I found out that this was another major engine issue. They need to order several parts, one of which is on backorder. As of 5/24 it has been out of service for an additional 5 days, bringing the total up to 27 days out of service, and there are currently 4800 miles on the car.

ON APRIL 3, 2021 AT APPROXIMATELY 5:00PM, WHILE DRIVING ON THE HIGHWAY THROUGH NORTH CAROLINA (ON A TRIP FROM MARYLAND TO FLORIDA) WITH MY FAMILY OF 5 (TWO ADULTS AND 3 YOUNG CHILDREN, INCLUDING MY INFANT SON) OUT OF NOWHERE MY BRAND NEW TAHOE BEGAN SHAKING UNCONTROLLABLY AND THE ENGINE STARTING POPPING AND SPUTTERING AS IF IT WERE GOING TO GIVE OUT COMPLETELY. THIS OCCURRED ON A VERY BUSY HIGHWAY, WHERE MY VEHICLE WAS SURROUNDED BY MANY OTHER VEHICLES DRIVING AT HIGH RATES OF SPEED. IT WAS A VERY FRIGHTENING SITUATION AND I IMMEDIATELY EXITED THE HIGHWAY AND STOPPED AT THE NEAREST SAFE LOCATION, WHICH WAS A WENDY'S RESTAURANT. AT THE TIME THAT THIS SERIOUS SAFETY DEFECT OCCURRED, MY BRAND NEW 2021 CHEVROLET TAHOE RST, WHICH I HAD OWNED FOR LESS THAN 6 MONTHS, HAD ONLY 5334 MILES ON IT. I CONTACTED ONSTAR AND WAS TOLD THERE WERE NO ISSUES DETECTED AND THAT I SHOULD "TAKE IT EASY" AND CONTINUE DRIVING. THE ENGINE CONTINUED SHAKING AND SPUTTERING FOR ABOUT AN HOUR AND THEN STOPPED. WE WENT TO ATLANTA TO MEET WITH FAMILY AND PARKED THE CAR. THE NEXT MORNING WHEN I WENT TO START THE CAR, IT BEGAN SHAKING AND SPUTTERING AGAIN LIKE THE ENGINE WAS GOING TO BLOW AND THE ELECTRIC PANEL ON THE CAR DISPLAYED A NUMBER OF ERRORS. I CONTACTED ONSTAR AND WAS INFORMED THERE WAS ENGINE TROUBLE AND I SHOULD TAKE THE CAR TO THE NEAREST DEALER. I STILL HAVE NOT GOTTEN MY CAR BACK. I HAVE INITIATED A LEMON CLAIM WITH GM BUT THEY HAVE SAID THERE'S A BACKLOG AND HAVE NO ETA ON WHEN THIS ISSUE IS TO BE RESOLVED. MEANWHILE, MY FAMILY IS OUT OF A VEHICLE AND I AM STILL PAYING A CAR NOTE FOR AN $80,000 BRAND NEW CAR THAT I DO NOT HAVE ACCESS TO AND THAT IS TOO DANGEROUS TO DRIVE. SOMETHING NEEDS TO BE DONE ABOUT THIS AS I'VE SEEN OTHER REPORTS OF SIMILAR ISSUES ON THE INTERNET. PLEASE HELP.

TL* THE CONTACT OWNS A 2021 CHEVROLET TAHOE. THE CONTACT STATED WHILE DRIVING AT LOW SPEEDS, THE VEHICLE STALLED WITHOUT WARNING. THE CONTACT RECEIVED A NOTIFICATION FROM ONSTAR THAT THE ENGINE AND TRANSMISSION HAD FAILED. THE VEHICLE WAS TOWED TO BEAVER CHEVROLET (3494 PHILIPS HWY, JACKSONVILLE, FL 32207, (904) 398-3036) TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE ENGINE HAD COLLAPSED. THE VEHICLE WAS NOT REPAIRED. THE CONTACT REQUESTED A NEW VEHICLE. THE MANUFACTURER WAS CONTACTED HOWEVER, NO FURTHER ASSISTANCE WAS PROVIDED. THE FAILURE MILEAGE WAS 2,700.