Engine And Engine Cooling Problems of Chevrolet Tahoe - part 2

The component at issue is the engine, which suffered a sudden and catastrophic failure due to unknown causes. At no time prior to this incident were there any warnings, symptoms, or indications of an underlying mechanical defect that would have allowed for preventative action. While operating the vehicle on the highway with my family present, multiple warning indicators activated simultaneously, including a blinking check engine light, traction control light, esc warning, and a forward collision warning. Immediately thereafter, the vehicle experienced a rapid and significant loss of power accompanied by a loud and persistent engine knocking noise, rendering the vehicle unsafe to operate and placing the occupants at risk. It is important to emphasize that traction control and esc systems are not causally related to an engine misfire condition, further supporting that this event was abrupt and not part of a progressive or diagnosable issue. A diagnostic scan performed at that time identified a misfire in cylinder 1. Upon delivery of the vehicle to the dealership for inspection, it was determined that the engine had suffered complete internal failure and was deemed “blown. ” this finding confirms the occurrence of a catastrophic mechanical breakdown. Based on the sudden onset, absence of prior warning, and severity of the failure, there is no reasonable basis to attribute this condition to normal wear and tear, operator misuse, or neglect. Rather, the facts support the conclusion that this was the result of a latent defect or internal mechanical failure beyond the operator’s control. Accordingly, this matter should be addressed under applicable warranty coverage or consumer protection standards.

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During highway driving, alert on dashboard stated “electrical system failing enter idle mode”. Tahoe slowed down and then engine began knocking right as it shut off resulting in needing to coast to the shoulder of the highway safely since engine was off. Towed to dealership and then they came back saying needed a new battery, new alternator belt, pulley and water compartment. After those installed, additional call was made indicating the engine needed a full replacement as it keeps overheating despite no sensor alerts and codes are being tripped. Here we are asked to pay 16k for new engine install and unable to fix.

Passed a truck in 2023 chevy Tahoe on a two lane highway and the Tahoe would not accelerate. It switched into neutral and would not run. This was a major safety issue. There was a semi truck behind me that could have run over me and my family. Luckily there was wide open area next to the road that I coast into. Truck was towed to a dealership out of state while we were on vacation.

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The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving approximately 45 mph, the check engine warning light illuminated, and the message “reduced acceleration - drive safely” was displayed. The vehicle then started shaking abnormally. The contact pulled into a nearby parking lot, turned off the vehicle, and waited for a while before restarting the vehicle. After restarting the vehicle, the warning lights remained illuminated, and the vehicle continued to shake abnormally. The vehicle was taken to auto zone, where a certified mechanic diagnosed the vehicle and determined that there was a bent rod inside the engine. The vehicle was not repaired. The vehicle was taken to the dealer, who confirmed the diagnostic result and that the failure was causing additional damage to the crankshaft. The dealer determined that there was a misfire in the engine and that the valve lifter was malfunctioning. The contact was informed that the lifter and the camshaft needed to be replaced, and the engine needed to be repaired. The vehicle was not repaired. The contact researched and became aware of NHTSA campaign number: 25v274000 (engine and engine cooling); however, the VIN was not included. The manufacturer was informed of the failure and confirmed that the VIN was not included in the recall. The contact was referred to the dealer to inquire about a goodwill repair for which the contact could be reimbursed if the VIN was later added to the recall. The manufacturer referred the contact to the NHTSA hotline to report the failure. The failure mileage was approximately 100,000.

My wife just picked up our 4 year old from daycare. She just merged onto I-81n and the vehicle shut off on her at highway speed during rush hour! a message on the dashboard said "please restart vehicle". She managed to pull the Tahoe off onto the shoulder, but couldn't get it started. She remained in the vehicle with my daughter and called 911 to request a state police vehicle park behind her so that she wouldn't be hit by any passing traffic. I (her husband) met her on the side of the highway and we tried starting it with a battery booster pack to no avail. We called a tow truck and had the car towed to the dealership that we purchased the vehicle from. They confirmed that the motor was indeed locked up and needs to be replaced. This vehicle already underwent the 6. 2l recall test and "passed". It was running the 'remedy' 0w-40 oil. This is completely unacceptable.

We were driving down the highway at around 77 miles per hour. I noticed that the vehicle chimed as though I initially got into it and needed to start the engine. I saw the dashboard asking me to start the engine. I attempted to start it while we were coasting to a stop, but it wouldn't start. I was able to barely get out of the lane of travel and avoid a collision. I tried to turn off the vehicle and turn it back on but it would not start. It would not even turn over. The vehicle eventually cannibalized the battery because it would never shut off.

During a road trip, we came to a stop and upon stepping on gas to proceed on the road and it wouldn't go. The engine revved and "pulled" until we were able to move. We took it to a dealership as well as private mechanic and was told it is an engine problem and running $3k or more to have it fixed. We have small children and consider this a safety hazard. Unfortunately, this is the only vehicle we have to commute.

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Motor is not included in the 6. 2 recall for some reason. It is consistently burning through 3 qts of oil every 2-3k miles. This is a major concern considering I travel a lot. I want to know why this specific motor isn’t covered in the recall considering it is having the same issues as the current recall. This has been an ongoing issue and I have been waiting for a recall notice. Gm dealership says there is no recall and won’t ever be one.

1) the engine failed and lost propulsion while driving. It is currently at the dealership where I purchased the vehicle new, so it may be available for inspection upon request. 2) my safety was put at risk because the vehicle lost propulsion while driving. This is a dangerous situation in general. In my case I was able to pull over safely and have it towed to the dealership. 3) the problem is that the engine failed. This can be confirmed by the dealership. 4) this 6. 2l engine was part of the n252494001 recall for specifically the issue of engine failure and loss of propulsion, so it had been inspected by the dealership recently. I brought the vehicle into the dealership for this recall several months ago. Per the recall, they told me that the engine would need to be replaced if it didn't pass the inspection. They performed a pico test, informed me that it passed the test, and changed the oil to 0w-40. It has not been inspected by gm, the police, insurance representatives or others at this time. 5) there were no warning lamps, messages or other symptoms of the problem prior to the failure.

The contact owns a 2026 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed, the engine seized. No warning lights were illuminated. The contact stated that while attempting to restart the vehicle, the vehicle failed to start. The vehicle was towed to the dealer, where it was diagnosed with engine and radiator failure. The contact was informed that the engine and the radiator needed to be replaced. The vehicle was not repaired. The contact was informed that the repair was under warranty, but the parts were unavailable. The contact stated that the failure had occurred three months after purchasing the vehicle. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 3,900.

I am writing to formally file a safety complaint regarding a catastrophic engine failure in my 2026 Chevrolet Tahoe equipped with a 6. 2l engine. The vehicle had approximately 9,640 miles at the time of failure. On March 21, 2026, while driving on a highway, the engine failed suddenly and without warning, creating an unsafe and potentially dangerous situation. The vehicle lost power and had to be towed from the highway to colussy Chevrolet for inspection and repair. On March 22, 2026, the dealership confirmed that the engine required full replacement and stated that a new engine had been ordered, with an expected arrival date of March 30. I specifically requested that a new engine be installed, given the extremely low mileage and severity of the failure. Approximately one week later, I followed up and was told the engine was still scheduled to arrive on March 30. However, on March 30, I was informed that the order status had changed to “under evaluation,” and the service manager indicated that the replacement engine would likely be a remanufactured unit instead of a new one. On April 1, 2026, I contacted general motors customer support to escalate the issue and reiterated my request for a new engine, as well as requested a loaner vehicle due to the loss of use of my vehicle. A representative opened case #92297395 and advised that the issue had been referred to the parts delay department, with a promised follow-up within 24 hours. On April 2, 2026, the dealership informed me there was no change in status and that while they intended to provide a loaner vehicle, none were available. As of April 6, 2026, I have not received a loaner vehicle or any follow-up regarding availability. On April 6, 2026, I received a call from a general motors customer assistance representative stating that there are ongoing delays related to both the engine and radiator, with no estimated timeline for repair completion.

While driving, the engine started to shutter and run rough. Pulled over to check and see if everything was ok. When restarting engine it developed a ticking noise which got worse and worse. We then made an appointment at a transmission specialist to get it serviced. While driving there the engine started experiencing engine failure with loss of power and loud ticking noise. Diagnostic from trans shop showed issues with engine and cylinder 4 misfire detected. Yes, the vehicle can be inspected upon request. Safety was put at risk while driving when engine started to fail. Had to pull over and have towed. Independent service center has confirmed issues. Report in attachments. No warning lamps or messages appeared prior to failure issues. The issues first started on March 18th 2026. SUV has been un drivable since. We have been unable to find a repair shop who is willing to do the repairs needed. The vehicle really needs a whole new engine.

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I had the recall for the momentary rear wheel lock-up completed on 2025-05-04. While I was driving March 2026 my Tahoe went into limp mode and I had to have it towed because it wouldn’t reverse it was towed a day after this happened to lynch Chevrolet. It has sat there ever since with no fix in site. I had to get a rental vehicle that gm is paying for but they have stipulations to what they pay for and the vehicle they gave is not comparable or better than my car. Not only is this an inconvenience but they are doing the bare minimum to help with their mistakes.

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Since March of 2025 I have identified a critical safety defect with my vehicle. When driving and without warning, the vehicle unexpectedly shifts to neutral, experiences a loss of propulsion, and the engine shuts off. This has occurred multiple times in which I narrowly escaped collisions with other vehicles or objects. If this would occur at a high rate of speed, it would certainly result in serious accident including possible fatality. I have experienced three near-accident scenarios when I had children in the vehicle. I have worked with classic Chevrolet in sugar land, texas who has made six attempts at repair. They have each time found a different component attribute to an error code and replaced that part. After each visit they tell me that the car is fixed and safe to drive. They have never been able to provide a clear explanation as to why I am experience this reoccurring issue, but attribute it to a different part each time. Within 5 days to 2 months, the incident repeats. I have recent video of the incident that I can share. Chevrolet customer care has been minimized my concern and informs me that their service staff has found the vehicle to be fully operational and safe to operate. I have spent over $6,000 in failed repairs. I do not feel safe operating this vehicle. That list of repairs includes: March 7, 2025 - battery replacement March 28, 2025 - DC/DC power converter April 22, 2025 - ecm updates January 8, 2026 - •throttle body replacement •serpentine belt replacement •engine air filter replacement •transmission fluid flush •coolant fluid flush •fuel injection cleaning •hydrogen carbon cleaning service January 23, 2026 - power control module (recall) January 30, 2026 - rear differential system replacement March 10, 2026 - • replacement of the high-pressure fuel pump • replacement of the DC power supply converter • hydrogen carbon cleaning service I can share all invoices. Chevy is not taking this matter seriously. Please support.

On March 14,2026 I was driving 80 mph on the interstate and the vehicle shifted to neutral and shutoff. Shortly before that the vehicle revved to 4000 rpm and you could feel rhythmic vibrations. The vehicle was towed to a chevy dealership and diagnosed as loss of propulsion needing a new engine. Tahoe had 104,000 miles at failure.

While driving down [xxx] the car started making a weird noise as we slowed down for an upcoming light. The light changed and as we started to drive again the check engine light came on and I lost power steering. I was trying to navigate the car off towards the shoulder but the car was hard to maneuver, but was able to move into the right lane. I had to drive the car slowly as to not stop the engine propulsion and stalling. But had no luck once we reached the intersection on [xxx] and [xxx] . At this point the car just died. Nothing was working. Hazard lights didn’t even work at one point. This situation left me and my family in the middle of traffic on a busy highway road. The only thing we had in our favor was the car stoped right at a red light so traffic would have to slow down every so often to the stoplight. We had to have the car towed off the road at around midnight and they took it to the dealership. The engine had a complete failure (found out after the dealership took apart the engine). The email stated: a further oil sample confirmed excessive metal throughout the engine at this point we proceeded with disassembly to identify the source of the failure. After removing the oil pan and inspecting internal components, we found internal engine damage. Specifically, the connecting rod bearing on cylinder 5 had failed, causing significant scoring to the crankshaft, camshaft, and related engine components. The engine has experienced a major internal failure due to the failed rod bearing, resulting in internal damage. Because of the severity of this condition, internal components are not serviceable individually. So the engine replacement would be required. This car is only 3. 5 months old, and other than a safety switch that was a manufacture issue we had to have fixed there were no other warnings my engine was going to die and leave me in the middle of the road. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The vehicle shifted itself into neutral and shut off while driving. It happened twice in three days. The first time I was pulling into the driveway so I was able to put it in park and restart the car safely. The second time I was in the middle of traffic in tampa and it shifted into neutral and shut off in the middle of the road. Luckily no cars hit me but again I had to apply the break , restart the car and put it back in drive. This was very scary and I had my kids with me. Earlier in the day I had been driving on 75 and if it had happened then it could have been a bad wreck. It shows there are no current recalls on my vehicle. No warning lights or messages appeared. Vehicle was purchased less than 30 days ago. I will contact the dealership to verify there are no open recalls just in case but again when I checked I found none.

Total engine failure.

The contact's wife owns a 2022 Chevrolet Tahoe. The contact stated that while driving approximately 50-60 mph, several unknown warning lights illuminated. The driver pulled over to the side of the road. The vehicle failed to restart and was towed to the dealer, where it was diagnosed and determined that unknown engine valves had collapsed, and there was possible camshaft damage. The contact was advised that further diagnostic tests were required. The dealer informed the contact that a recall should be issued for the failure. The vehicle was not repaired. The manufacturer was notified of the failure, and the contact was referred to the dealer for assistance. The failure mileage was approximately 68,000.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at various speeds, the forward collision avoidance message was intermittently displayed. The vehicle was taken to a dealer, where a computer module was replaced. While driving at various speeds, there was an intermittent knocking sound coming from the engine, with the check engine warning light illuminated. While driving at an undisclosed speed, the knocking sound became constant. The vehicle was driven to the dealer, and upon inspection, the mechanic discovered a bent engine rod inside the engine. The vehicle was diagnosed with engine failure, and the contact was provided an estimate for the repair. Upon investigation, the contact discovered the failure was associated with NHTSA campaign number: 25v274000 (engine and engine cooling). The manufacturer was initially notified of the failure through the dealer, and the contact was later informed that the manufacturer agreed to cover half the cost of an engine replacement. Upon calling the manufacturer directly, the contact was referred to the NHTSA hotline to report the failure. The vehicle was not repaired and remained with the dealer. The failure mileage was approximately 72,000.

The contact owns a 2026 Chevrolet Tahoe. The contact stated while driving 70 mph on the freeway, while depressing the accelerator the vehicle shut off unintendedly. The vehicle was coasted to the right side of the roadway. While attempting to restart the vehicle, the vehicle failed to respond as intended. A dealer was contacted. The vehicle was towed to the dealer and was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 3,783.

The contact owns a 2024 Chevrolet Tahoe. The contact stated that while driving at 76 mph, the vehicle was driving abnormally rough. The rpm increased, and the message to shut-off engine and restart the vehicle was displayed. The contact stated that the failure occurred while the two minor children and their friends were inside the vehicle. The contact's daughter stated that the vehicle was in neutral after leaving the car wash. In addition, the failure occurred while driving on a busy two-lane highway. The vehicle was almost involved in a crash twice when the engine seized in the middle of the left lane. The contact stated that while attempting to drive the vehicle to the shoulder of the road, the engine seized. The contact stated that while attempting to start the vehicle, the vehicle failed to restart. The local police assisted with traffic control. The vehicle was towed to the dealer; however, the failure was not duplicated. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The dealer was informed that the mobile app indicated a transmission and engine failure. The dealer informed the contact that because the engine seized, the engine needed to be replaced. The dealer informed the contact that there was no indication of what caused the engine to seize. The manufacturer was made aware of the failure but provided no assistance. The contact referenced an unknown recall with a similar description; however, the VIN was not associated with the unknown recall. The contact was advised to contact the NHTSA hotline to report the failure. The failure mileage was approximately 16,988.

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I backed out of my driveway put it in drive stepped on the gas and the car hesitated and just shut down. Steering wheel locked up I had no time to even stair it out of the road. Try to start it and would not start but the dash and radio would come on. Tried to get in neutral to get it out of the road but everything is electronic so we could not do it. We had to have the car towed to the closet dealership. It took them two weeks to even diagnose the problem working along side gm service. Two weeks could have been saved with gm knowing they had a bulleting and problem with the lzo 3. 0 duramax diesel motors. It is not week 5 I still do not have a car and they have not even started putting the new motor in. Gm has not been helpful at all! it has been a miserable 5 weeks. They told me I could rent a car myself with a cap of $44 per day with all taxes and fees included and I may be reimbursed. So I have to put the money out of my pocket first and they may reimburse me. At this point I would be already out $1540. 00 which is not in my budget. I purchased a brank new 2025 chevy Tahoe 3. 0 duramax diesel motor car and it only has 8k miles on it and the motor is blown. I also paid for the car in full. I have asked gm numerous times to tell me where I went wrong and they have no answers as usual. It has been a horrible experience to this point and I have no idea when it is going to end. The dealership is trying to tell me that my car would not have dies going at higher speeds. I am so luck it happened in my neighborhood and not while on the highway. I could have been killed!.

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The contact owns a 2026 Chevrolet Tahoe. The contact stated that after making a long-distance trip, the check engine warning light illuminated. Additionally, the side mirrors were moving independently, and the vehicle failed to start after several attempts. The vehicle eventually restarted the following day, and the contact stated that the check engine warning light turned on the drive to the residence. The vehicle was taken to a dealer where a code reader was used to diagnose the vehicle. The contact was informed that since the check engine warning light was off, the dealer was unable to determine the cause of the failure. The vehicle remained with the dealer overnight and a multi-point inspection was performed, but the dealer found no cause for the failure. The contact stated while driving 60 mph, the vehicle unexpectedly stopped in the middle of the highway. The vehicle hesitated while depressing the accelerator pedal, with the check engine warning light illuminated, and the messages "change engine oil soon" and "engine overheating turn off vehicle" displayed. The contact was unable to move the vehicle and was forced to turn on his hazard warning lights due to the failure. The contact called 911 and highway patrol assisted with moving the vehicle off to the shoulder. Due to the failure, the vehicle was towed to another Chevrolet dealer before being towed back to the original dealer. The vehicle remained with the dealer. The contact was informed two days later that the vehicle had been repaired; however, the contact no longer believed that the vehicle was safe. The contact no longer wanted the vehicle. The manufacturer was notified of the failure and a case was filed. The contact was later informed that the vehicle did not qualify for a buyback. The failure mileage was 897.

At 64000 miles my 2019 chevy Tahoe has to be replaced due to lifters failing. Gm/chevy wants to charge me $17000 to install a new 6. 2l - v8 engine. (same engine that had the lifter problem). That engine has been recalled on earlier and later models. What do I do to fight the cost of new motor ?.

I was driving when I noticed my vehicle lagging and possibly misfiring, and then the "service four-wheel-drive" warning appeared. I was just down the road from my house, so I pulled into the driveway and put the car in park, but it wouldn’t turn off. I realized the parking brake was engaged and wouldn’t release either. I was stuck in two-wheel drive and couldn’t switch to four-wheel drive, and the emergency brake wouldn't disengage when I pressed the button, so the vehicle still wouldn't shut off. I had to put it in reverse physically step on the gas, which is the only way the parking brake finally disengaged and allowed the vehicle to shut off.

Exhaust fumes and carbon monoxide are entering my cabin. I have replaced exhaust manifold gaskets (both sides), exhaust manifolds, exhaust manifold donut seals to the y-pipe and I still get carbon monoxide entering cabin giving my headaches. Please help.

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The vehicle motor goes out with no indication that anything’s going to happen. It does this a different stages of miles. Mine happened when I was passing someone on the high way. It just shut off.

While driving on the highway, the vehicle suddenly downshifted and shut down and would not restart. All lights appeared on the cluster and showed "conditions not correct for shift". Had to have vehicle towed from the side of the road and wasn't even able to shift into neutral.

Our vehicle passed their inspection required test for the engine recall and then at an intersection just died with absolutely no warning and wouldn’t even start again. Warning light for low engine oil came on. We were stuck and couldn’t even put the vehicle in neutral to be towed out of the intersection. Had to call a flat bed tow truck to load it and take to dealership where it was confirmed the engine failed!!! police did show up at the scene to facilitate traffic and the loading of th vehicle.

I took my 2023 chevy Tahoe in for all recall corrections promptly when the notices were received. My last recall was to run a check to see if my motor was one of the defective 6. 2l engines. It was determined it was not and the dealer changed my oil to the new required 0w-40w. Now a month later as I am accelerating on to the freeway ,I am at 65 mph I cross traffic to merge on to a connector bridge and my car rpm's go through the roof and the car starts to slowly lose power. Zero warning lights are on at this point just decreasing power. As I am on the bridge my engine light comes on with a engine oil hot idle engine notice I am now at 35 mph. Then a oil pressure low turn vehicle off notice comes up and we are at 15 mph the car turns off. The screen says press start again but as we do it wont do anything. It then randomly starts turning off and on. We got to a point on the bridge where we could coast to the connecting freeway below and pull over. My car was towed to the dealer where it has been confirmed it needs a new motor with no know eta of the new motor.

Driving down i495 in mass when engine stopped with no warning or prior symptoms. My wife and 4 children (including 2 friends of our kids) were in the car. Luckily we were able to safely pull to the shoulder after coasting through a construction zone. If we hadn’t made it to a safe piece of shoulder chances are high that another vehicle would have hit our vehicle and hurt and killed us. These 6. 2 engines are a serious safety hazard and I only hope my new engine proves to be reliable. Car was towed to dealer who diagnosed it as a seized motor. Car is a 2022 chevy Tahoe with the problematic 6. 2 engine. Engine had passed Chevrolet’s pico test as per the 6. 2 recall about 7,000 miles before it seized. Vehicle and engine dealer maintained with all required changes/maintenance. Engine seized/failed with no warning.

My 2021 Chevrolet Tahoe engine seized while I was driving on the highway. All I heard was a loud clunk then there was a sudden power loss while I was driving before I could even get to the side of the road. I had to pay, out of pocket, to get a tow because the vehicle failed to crank or start. I had the vehicle towed to the chevy dealership in paramus, NJ just to find that this is a known recalled issued with the 5. 3l, v8 engines which is the engine my vehicle has. There seem to be problems specifically regarding defective connecting rods or the crankshaft but for some strange reason my vehicle's VIN number is not included in this recall although it is the same year, same vehicle, same engine and same problem. My vehicle should be included in the recall so it can be repaired for free at the chevy dealership in paramus, NJ as I use this vehicle to transport children and that is very unsafe to have this defect and not fix it for free when it is not the fault of the driver.

*total engine destruction from thrust bearing failure (gm bulletin 25-na-307) * yes, failure has been confirmed at chevy dealership (davis Chevrolet gainesville FL) * yes, problem has been reproduced at dealership *only the dealer service department has confirmed failure warning lights, thrust bearing failed sending shrapnel into the bell housing torque converter just loud metal clanging noise from bellhousing area knows of the problem but will not recall just handling them at dealerships as they fail this happened in an isolated area it would have left us stranded in the middle of no where * I am awaiting the service order from the dealer in pdf form and can send upon request! for now I have a 4 month old $90,000 Tahoe in the shop waiting on an engine!.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving 65 mph, there was an abnormal vibration coming from the engine compartment and felt in the steering wheel. The check oil warning light illuminated. The vehicle was taken to the residence and then to the dealer, where it was determined that the vehicle was functioning properly, and there was no oil leak; however, the oil level was low even though an oil change was not yet due. The dealer added oil to the vehicle, and an oil consumption test was ordered. The manufacturer was notified of the failure and a complaint was filed. The vehicle was not repaired. The failure mileage was approximately 48,000.