Engine And Engine Cooling Problems of Chevrolet Tahoe - part 1

2021 chevy Tahoe with 6. 2 engine (VIN: [xxx]) has been experiencing severe oil consumption, and making odd noises during operation. All while notshowing any recalls for the issue. Although there's an active recall/investigation into the 6. 2 l87 engine, which my vehicle has. I've been having valvoline document the severe oil consumption during oil changes per manufacturer specs. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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On June 12, 2026, while operating my 2025 Chevrolet Tahoe, I experienced an apparent powertrain or transmission-related issue. At the time, the vehicle was already exhibiting another defect involving the air conditioning system, with the driver's side blowing hot air and the passenger side blowing cold air. While attempting to accelerate and pass another vehicle, the engine rpm suddenly increased to approximately 6,000 rpm. The rpm remained elevated momentarily before gradually decreasing. The vehicle's response was abnormal and inconsistent with normal acceleration. Because I was close to home, I continued driving but remained concerned about the vehicle's operation. Since that incident, the same condition has occurred approximately two to three additional times. The problem is intermittent and does not occur every time I accelerate, making it difficult to predict when it will happen. This condition creates a safety concern because sudden, unexpected increases in engine rpm while attempting to accelerate can affect vehicle performance and driver confidence, particularly when passing other vehicles or merging into traffic. The vehicle is being returned to the dealership for evaluation, and the defect remains unresolved.

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The contact owns a 2023 Chevrolet Tahoe. The contact stated that while driving at 40 mph, a warning message advising to reduce acceleration was displayed, the check engine warning light illuminated, and the vehicle stalled. The contact was able to pull over safely. The contact stated that the failure was recurrent. The dealer was notified of the failure and diagnosed the vehicle with a valve failure. No further information was available. The manufacturer was notified of the failure. The failure mileage was approximately 57,000.

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While driving my 2021 Chevrolet Tahoe, the check engine light illuminated. Shortly thereafter, the engine began shaking severely and I heard clicking and popping noises from the engine compartment. The following morning, the vehicle was barely operable, shaking excessively and unable to properly reverse. Due to the unsafe condition, I had the vehicle towed to the dealership. The dealership diagnosed a failure involving all 8 lifters on one side (bank) of the engine, requiring extensive engine repairs. My vehicle has approximately 74,000 miles, which I believe is low mileage for such a significant internal engine failure. The symptoms included severe engine vibration, misfiring, loss of performance, and the potential for loss of power while driving. This is not the first major failure I have experienced with this vehicle. In approximately April 2023, when the vehicle had about 32,000 miles, it unexpectedly shut off while I was reversing in a roadway. The dealership diagnosed a failed fuel pump control module (fuel pump modulator). Similar failures were later identified in recalls and corrective actions affecting other gm vehicles. I am concerned that my vehicle has experienced multiple failures involving components that appear to be associated with known issues affecting gm vehicles, yet my Tahoe was not included in applicable recalls. These failures created significant safety concerns, including unexpected engine shutdown, loss of vehicle operation, and potential loss of power while driving. I respectfully request that NHTSA investigate whether my 2021 Chevrolet Tahoe vehicles should have been included in existing and future safety recalls related to these defects and other known defects that gm vehicles are experiencing with the motor, transmission and other parts. Note: no invoice is available yet as I am seeking gm assistance due to no warranty status. Estimated repair cost from dealership is up to $8,900.

The contact's husband owns a 2021 Chevrolet Tahoe. The contact stated that while her husband was driving at an undisclosed speed, the vehicle shuddered and experienced a loss of drive power. A message to turn on the vehicle was displayed. The contact's husband coasted the vehicle to the side of the road and attempted to jumpstart the vehicle, but the vehicle failed to restart. The vehicle was towed to the dealer, who determined that the engine had seized and the crankshaft had failed. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The contact related the failure to NHTSA campaign number: 25v274000 (engine and engine cooling); however, the VIN was not included in the recall. The manufacturer was made aware of the failure and advised the contact to file a complaint with the NHTSA hotline. The failure mileage was approximately 130,000.

My wife was stopped at a stop light traveling west from and appointment. When the light turned green she moved her foot from the brake to gas when all of the warning lights. It happened at the worst time possible during rush hour and we were fortunate that she was not hit by traffic. After the police arrived to help re direct traffic and wait for a tow truck, we found coolant spilling underneath the engine towards the rear of it. Towed to local repair shop, they inspected and found the engine had a catastrophic failure. Likely related to the current recall for the 6. 2l v8 engine installed in this Tahoe.

While traveling at 55mph yesterday, I experienced a full engine failure which shut the car off fully while traveling on a single lane double yellow road. I was able to coast to a secure location. The car will not start or go into neutral. There were no warning lights that occurred at any time prior to the failure. This all occurred while on vacation 2 hours away. I previously went to the dealership for the recommended "fix" for the recall but that obviously did not solve the problem. This was an extremely unsafe situation for me and my family. I also encountered towing costs and significant loss of time. In addition, the car is at a dealership over 2 hours from my home. Chevrolet should be held accountable well beyond a recall notice which didnt solve the problem.

Total engine failure.

On may 19, 2026, my 2025 Chevrolet Tahoe suffered a sudden, catastrophic engine failure while traveling at 60 mph on a public roadway. I originally took retail delivery of this vehicle brand new on October 29, 2025, with only 14 miles on the odometer; at the time of the failure, the vehicle had only accumulated 10,049 total miles. The failure resulted in an immediate, complete loss of motive power at highway speeds, creating a severe, life-threatening safety hazard to myself, my passenger, and surrounding traffic. The vehicle was towed to an authorized gm dealership for emergency service. Upon removing the oil pan, dealership technicians discovered a high volume of metal debris and fragments, indicating a severe internal mechanical failure (likely failed engine bearings). General motors corporate subsequently mandated secondary diagnostic teardowns. Following these tests, gm confirmed a total, non-repairable engine failure requiring a complete engine assembly replacement. This vehicle has remained entirely out of service and non-operational since the date of the incident. On June 24, 2026, with the vehicle out of service for 36 consecutive days, I issued a formal demand letter to general motors customer relations, demanding that they adhere to new york state lemon law statutory requirements and initiate an immediate vehicle buyback. Due to this severe defect, this vehicle is now deemed entirely unsafe and unreliable for my family, as our confidence in its mechanical integrity is permanently destroyed. Furthermore, a vehicle requiring a complete engine replacement at this mileage has suffered severe diminished financial value. A catastrophic engine failure on a low-mileage, current-generation vehicle poses an immediate, critical manufacturing defect and an unacceptable risk of high-speed collisions.

I was leaving my neighborhood on Saturday night 5/16 around 5:30 and on the way out all of a sudden the dashboard started lighting up and the speed was dropping despite me being on the gas. The screens kept flashing then the car stopped and went into park and I could not get it out of park. I was at the front of my nieghborhood entrance and it made it hard for others to come in and out. I tried to restart it. My husband tried to jump it. I tow truck came about two hours later only to realize it could not tow it since the vehicle was stuck in park and could not be powered to move it to neutral. They had to call a new tow truck. I was sitting in my car stuck in the entrance of my neighborhood impeding traffic for close to 4. 5 hours. A new tow truck finally arrived at close to 9:45pm. It was towed on dollies to the dealership. They inspected it today and said the starter and the engine had both failed/blown and needed full replacement. I am waiting to hear back from them on the estimated time for replacement biut could take weeks which is devastating. My vehicle is the 2025 chevy Tahoe high country with the 6. 2 l v8 engine that I now understand has issues prior to 2025 and was recalled but nothing yet for the 2025. My car is only 9 months old and has 12,100 miles on it. I am devastated. Prior to this I had no issues and there were no sounds or issues it just happened. It was dark by the end and I was sitting in the middle of the road and the lighting in the area is limited so I had to have someone bring me lamps so other drivers could see me as the car is black and it was very dark. Someone almost hit me pulling into the neighborhood as a result thankfully I was able to get lamps.

Engine locked up at 10,000 miles.

On may 2nd 2026 I was driving my 2021 Tahoe high country with the 6. 2 motor at 60 mph and started to slow down before my left hand turn. In the process of slowing down at about 40mph I heard a loud bang/thud noise. The car had completely shut down all motor related usage. I coasted into the shoulder on the side of the road the vehicle would not restart. I had my children and wife in the car. There were no check engine lights or any other warning signs on the dash prior to this happening. The Tahoe was running perfectly fine. Ended up needing the vehicle towed to the Chevrolet dealership. It was confirmed upon dealership inspection by the mechanic that an intake valve spring broke and locked up the engine. We currently are being denied coverage through our extended warranty with endurance to replace the engine.

My 2017 Chevrolet Tahoe lt 4wd with a 5. 3l engine experienced sudden drivability issues related to confirmed afm lifter failure, including severe engine misfires (p0300), rough idle, shaking at stoplights, and significant loss of power while driving uphill and under load. The vehicle has approximately 140,000 miles and has been consistently maintained through Chevrolet dealerships. The condition has been diagnosed by premier Chevrolet of carlsbad. The engine experienced loss of power during operation, creating a potential safety concern when accelerating or driving in traffic conditions requiring consistent engine power. This issue appears related to widely documented afm lifter failures on gm 5. 3l engines.

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On 05/01/26 while driving on new york state thruway route 90 east, my check engine light came on. Almost simultaneously the vehicle began to lose speed and I could not accelerate. As I pulled over I could hear a loud clunky noise. The vehicle would not start and was dead on the side of the thruway. Eventually the vehicle was towed to the dealership I purchased it from where they told me "there is a loose part in the engine and the engine needs to be replaced". Sudden power loss of the vehicle represents a safety risk especially traveling at 65mph. To my knowledge the vehicle has been inspected by only the dealership. On 3/17/26 I alerted the dealership I purchased the vehicle from that I heard a ticking in the engine once in a while when I auto started the vehicle. I was told I would receive a call from servicing but never did.

Engine stopped while driving 70 mph down the highway and the car shifted into neutral. Had to cost to side of the road. Took car into dealership and even though the car was certified safe drive and the engine had no issues 5 months ago, I was told the engine was now locking up. The engine failed despite using the higher viscosity oil that chevy recommended. These greedy cunts at chevy placed me and my family's lives in danger to save a buck; they knew that the engines would fail and instead of replacing the engines, they put thicker oil in the cars to hopefully get the cars past warranty.

Chevy Tahoe with 6. 2 v-8 engine started making noise. Started rattling. Taken to dealership where I bought it. Oil changed found metal in the oil engine making all sorts of noise. Diagnosed to engine failure. New engine is ordered . It’s been 2 weeks and I am number 5 in order for engine replacement at the dealership.

My 2022 Chevrolet Tahoe diesel unexpectedly lost power while driving. I was stopped, made a right turn, and accelerated to approximately 34–40 mph on a two-way street when the vehicle suddenly shook, shifted into neutral, and the engine shut off without warning. There were no warning lights, dashboard messages, or prior symptoms before the failure. I was driving with two young children secured in car seats at the time. This created a serious safety risk because the vehicle became disabled in the roadway, and I had limited control while traffic was present. The vehicle has not yet been diagnosed, and the exact failed component/system is unknown. The vehicle is available for inspection upon request. The incident has been reported to a dealer or service center, but the problem has not yet been confirmed or reproduced at this time.

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Urgent: engine failure following recent service – 2021 Chevrolet Tahoe to whom it may concern, I am writing to formally request assistance and an investigation regarding a serious engine failure involving my 2021 Chevrolet Tahoe. In July 2025, I paid out of pocket to have the lifters and camshaft replaced on this vehicle. More recently, while traveling, the vehicle broke down and was taken to uebelhor Chevrolet, where the valve body in the transmission was replaced. After picking the vehicle up from uebelhor Chevrolet, the vehicle broke down again approximately one hour later while in henderson, kentucky. At that time, the engine began smoking, running rough, and misfiring. I checked the oil level during the incident and found it to be extremely low on the dipstick (I have photographic evidence of this condition). The vehicle had to be towed to kate faupel Chevrolet for further inspection. I was then informed that the engine has a dropped lifter on cylinder #8 and possible camshaft damage. Given the following factors: recent out-of-pocket lifter and camshaft replacement (July 2025) immediate failure shortly after leaving a Chevrolet dealership extremely low oil level observed at the time of breakdown (with photo documentation) diagnosis consistent with potential oil starvation and internal engine damage I am requesting that general motors conduct a full review of this situation to determine responsibility. This raises serious concerns about a potential defect, improper prior repair, or a service-related issue that resulted in catastrophic engine damage. At this time, I am not authorizing repairs until liability is determined. I am requesting: a formal case review and investigation assistance with repair or full engine replacement guidance on how this situation will be resolved this incident created a significant safety concern, as the vehicle became disabled shortly after leaving a dealership during travel. Please contact me as soon as possible to discuss next steps.

On Saturday, April 25, 2026, I experienced engine failure on my 2024 Chevrolet Tahoe 6. 2l v8. This was a very dangerous situation, and could of been potentially dangerous to others around me on the highway. There was no warning just complete loss of engine propulsion at highway speeds. It was towed to the dealership on this same date. On Monday, April 27, 2026, it was confirmed by the Chevrolet dealership that this vehicle suffered catastrophic engine failure and that the engine was seized up. Inspection would be available upon request.

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I am filing a safety complaint regarding my 2025 Chevrolet Tahoe premier for repeated brake assist/braking failures. Most recent incident: while driving, the check engine light came on. I turned the vehicle off for approximately 10 minutes and restarted it, but the check engine light remained on. Approximately 20 minutes later, multiple warnings appeared on the dash including: “brake assist failure press hard to brake,” “speed limited,” and “service esc. ” at that point, braking ability was severely reduced. I was close to my destination and approached a stop sign. I intended to roll through the stop sign because the brakes were not functioning normally, but another vehicle suddenly approached. I pressed the brake pedal with both feet. The brakes were stiff and hard to press. The vehicle still did not stop properly and came to a stop in the middle of the road past the stop sign. After arriving at my destination, the vehicle sat for approximately 1–2 hours. When restarted, the brakes appeared normal again, but the check engine light remained on. In the mychevrolet diagnostics app, it then showed warnings for engine and transmission system, transmission system, and four wheel drive system. While driving to the dealership afterward, the vehicle also began shaking. This same issue previously occurred on April 16, 2026. I was driving on the interstate when the brakes lost assist and the dash displayed “service esc,” “brake assist failure press hard to brake,” and “speed limited. ” after reaching my destination, I was told by someone at the dealership to turn the vehicle off for 10 minutes to see if that would fix things, so I turned the vehicle off for about 10 minutes. When restarted, all warning lights were gone and braking returned to normal. I still drove the vehicle to the dealership that same day for service. This is a repeated, intermittent brake failure / brake assist failure creating a serious safety hazard and near collision risk.

Vehicle is prompting a “decreased acceleration “ warning, will not shift past 3rd gear, and will not shift into reverse.

The car has cut off three time while at stoplights. I can get it restarted but the dealership cannot duplicate it even though there are codes in the system. Also the automatic braking will randomly stop when it shouldn’t and it is a hard braking.

Vehicle lost all power while driving on interstate, there were no warning messages displayed. The initial recall was performed on vehicle.

Well traveling motor started making a slight ticking noise, about a mile down the road started squealing like a belt issue, pulled over on the side of the road popped hood and heard the squeal better before it shut down. There was no check engine light or any indication there was an issue prior to this happening.

Vehicle power loss, some shaking with no warning lights on dashboard. Dealer confirmed it was engine failure.

2023 Tahoe z71 had recently been put in the shop, and evaluated for engine failure recall. Dealership/gm deemed it failed test for replacement, we were given 0w40 oil and sent back out, this last weekend we had catastrophic engine failure while operating at 50+mph.

The engine randomly shut off while driving down the interstate and wouldn’t start back up. The car had the recall “remedy” done to it. Inspection and thicker oil. The only warning I got was to restart the engine after it shut off. My safety was compromised by breaking down on a main interstate coming through memphis with no emergency lane to pull over in.

Engine has developed a miss and has check engine code p0300 random misfires. There are subcodes pending of p0011 and p0016 indicating crank and cam misalignment. This has all the classic signs for a failing engine. I am taking this truck in for the gm picoscope test, the oil was changed to 0w40 mobile one supercar oil approx. 2,800 miles ago when the truck was under powertrain warranty. I will preform a blackstone oil test to determine if there is abnormal engine wear. My truck is not in the VIN. Recall range.

The contact owns a 2023 Chevrolet Tahoe. The contact stated that the vehicle was previously repaired under NHTSA campaign number: 25v274000 (engine and engine cooling). The oil was changed at the local dealer. After 24 hours, the engine was blown after driving approximately 50 miles. No warning lights were illuminated. While accelerating from a stoplight, there was an abnormal squealing noise from the drivebelt. The vehicle was taken back to the local dealer, and the contact was informed that the flywheel was hitting the camshaft and changing the oil had disturbed the function of the vehicle. The vehicle was not fully diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 14,945.

***safety/danger*** on April 12th at around 5:30 p. M. My family of five, to include three minor children were returning home from visiting family which live about an hour and a half away and as we're traveling on the freeway at highway speeds, in traffic, our new Tahoe unexpectedly and without warning went into reduced power mode and cut speed down to approximately 35 mph in active traffic, which out my family and every other car around me in danger and in jeopardy of causing a collision and even worse, a multiple car pile-up as I dodged full speed traffic in front and behind me while traveling at approximately half their speed. I managed to exit the freeway and heard a loud knocking noise from the engine and saw the reduced power mode indicator, all of which had not happened before but again, the Tahoe is relatively new and was just over 5 months and at 8,889 miles at failure. I proceeded to contact gm roadside assistance. They sent a tow truck and I had to make arrangements for my family to return home, an hour away. I made it to the dealership with the tow truck driver after 9 p. M. ***catastrophic damage**" after the dealership inspected close to a week later they did determine that the entire engine and turbocharger had to be replaced, which they did in a little over a month, the dealership did their part but confidence is lost. Now I am hesitant to drive the Tahoe as it's the family vehicle but really put my kids, wife, myself and everyone around us on the road in danger as it, out of nowhere, cut speed drastically in active highway traffic.

Engine failure while driving to [xxx] from [xxx] . Mobile mechanic indicated a likely spun bearing. Less than 24,000 miles. Was stranded in [xxx] and delivered vehicle to local Chevrolet dealership same day as incident. It’s been over a month with no repair eta. Incurred significant travel and accommodation costs, with receipts available, due to the disruption. Gm had thus far refused to confirm any reimbursement of expenses. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

On April 10th, while traveling approximately 7 hours from home on a very busy highway in [xxx] , my 2023 Chevrolet Tahoe (6. 2l engine) suffered a complete and catastrophic engine failure, requiring a full engine replacement. The vehicle had to be towed and I was left stranded with no transportation. Prior to this failure, I had brought the vehicle to an authorized gm dealership for a recall inspection specifically related to the 6. 2l engine on September 9, 2025 with 36,162 miles. The dealership technician inspected the vehicle and informed me that my engine was not defective and cleared it. Shortly after that inspection, the engine suffered a total failure at 46,6xx miles on the vehicle. I am currently leasing this vehicle at approximately $1,100 per month and have been without the vehicle for an extended period while it sits awaiting repair. Gm customer care has been contracted and has indicated they cannot move forward with a buyback claim because the bbb is not taking my case because the vehicle is older then 2 years old which I know is a false legal claim. This is a serious safety concern, a catastrophic engine failure at highway speed poses significant risk to vehicle occupants and others on the road which appears consistent with other reported failures. I am aware that NHTSA has opened recall query rq26001 investigating the adequacy of gm's remedy under recall 25v-274. My experience is consistent with the 36+ complaints that triggered this investigation, engine failure occurring after an authorized dealer performed the recall inspection and cleared the vehicle. I am requesting this complaint be added to the rq26001 investigation file. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

We have a 2021 chevy. Tahoe, and we just had an inspection done because a light kept coming on saying that our engine might fail. The shop initially said it needed cam shaft replacement, but now are saying the entire engine needs to be replaced. The care has ~ 67,000 miles on it and is 5 years old.

As I was driving down the tollway in dallas going 75 miles an hour, my engine completely shut down and went into neutral in rush hour traffic. I had to slowly get over from being in the left lane as my car was slowing and slowing. I was able to get over on the side of the tollway as cars zoomed past me. By the grace of god, I didn't get hit. Once it was towed, the service department confirmed that it is my engine that shut down and the entire engine needs to be replaced. Now the problem is they cannot find an engine or parts to fix it. No warning came on at all before this happened. Very dangerous situation.

Suspension system failed- had to replaced, car difficult to control when operating. Repaired by dealer- country Chevrolet, benton ky- owner paid for repair. [xxx] engine failure- knocking and difficult to drive on returning trip from louisville ky to benton, ky. Taken to dealer on 4. 6. 2026 - made it without being towed- extremely slow- traffic hazard- Tahoe has lots of road miles- always repaired and serviced by dealer. There were no warning lights, symbols or indicators that there was a problem. Dealer still determining the extent of the damage. [xxx] benton ky information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).