Engine And Engine Cooling Problems of Chevrolet Tahoe - part 1

On 4/23/25, the check engine light came on and the vehicle reduced power. It was taken to dealership and a warranty service was performed, l87 engine loss of propulsion. The vehicle was in service for 90 days. On 7/15/26, vehicle shifted itself into neutral while driving on the highway, with 4 kids in the car. This is a safety issue for our family and all around us, as car loses ability to drive at interstate speeds. It would not go back into drive, needed to pull over and get towed to dealership. Dealership diagnosed it needed a new engine and radiator; it was in service for 60 days. On 10/10/26, vehicle shifted itself into neutral while driving with one kid in car while driving on the highway. Vehicle gave the "conditions not correct for shift" and would not go back into drive. Vehicle was shut off and was stalled on the highway, after a time of it being off, vehicle started back up and the check engine light was on. This is a safety issue for our family and all around us, as car loses ability to drive, once again, at interstate speeds.

See all problems of the 2023 Chevrolet Tahoe 🔎.

Vehicle shakes, warning messages repeatedly display on screen and continue to cycle. Gage dials go back and forth. Acceleration is very limited and vehicle is limited to a max speed of 62 mph. The ac goes to 76 degrees and blow at full speed. If the ac is turned off it automatically returns to 76 at full speed. Vehicle will not turn off. It is extremely dangerous because it occurs while operating the vehicle and sometimes power steering and braking are compromised. When it happens on the freeway I try to maneuver to exit but it is dangerous to myself and others driving near me. Dealer has not been able to diagnose the problems or make correction. This has happened 4 times in the last 12 months. The latest incident was on 10-9-2026.

See all problems of the 2024 Chevrolet Tahoe 🔎.

While traveling on I-684 at highway speed, my 2023 Chevrolet Tahoe with 43,000 miles suddenly shut off without warning and automatically shifted into neutral. I had a complete loss of propulsion. As a car guy who has been following the gm 6. 2l engine recall issue, I suspected it could be that. I was traveling in the left lane and had to carefully coast across active lanes of traffic to reach the shoulder. My wife and two young children were in the vehicle, and the sudden loss of propulsion created a significant risk of collision. There were no warning illuminations, messages, or other symptoms that I observed prior to the failure. The vehicle was subsequently towed to my Chevrolet dealer for diagnosis and is available for inspection upon request. As confirmed by the dealer, the engine completely seized causing the loss of propulsion. I will also share, about 1 year ago after the gm recall was issued, I took my truck back to the dealer. They cleared the engine for the propulsion issue, changed the oil for 0w40 and changed the oil fill cap in line with gm recall standards.

The afm/dod system failed and resulted in lifters and rocker arm failure.

I was picking my Tahoe up after a replacement on the blown motor was complete. (l87) I started it and immediately knew something was wrong. I reported it to the service advisor and the response was there were no warning lights so it must be fine. I asked them to sit in my car and they agreed it was not running right. They took it back and replaced a sparkplug that was causing the #2 cylinder to misfire. Almost 3 months later I was driving on the freeway when my Tahoe felt like it was going to stall. Again I had no warning lights appear. The diagnostics showed the same #2 cylinder misfiring caused by another sparkplug issue. This is all within 2,500 miles on a brand new engine.

There was no accident, but while I was on a busy highway, my vehicle started failing me. I wasn’t able to go past 50mph. After taking it to the dealership they said it’s a torque converter and transmission failure.

See all problems of the 2019 Chevrolet Tahoe 🔎.

* lifter bores and camshaft. Yes * the vehicle started to shake and started sending out alerts for multiple problems while we were driving on the interstate * yes. Bale Chevrolet estimated approx. $10,000 repair bill * no. It's currently at the dealership * as the car began to shake we started receiving numerous warnings, but not prior to the shaking.

The water pump failed. Platinum Chevrolet has the old one as they have replaced it. I was driving in [xxx] on a crowded street when I had to quickly pull over because of a terrible noise and the smell of leaking coolant. It made it dangerous for me to get to a parking spot in traffic without warning. There were no warning symptoms. Had to have it towed to platinum Chevrolet in terrell, texas, which did the inspection and water pump replacement. $1600. 00. No clue what caused it other than bad workmanship. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2020 Chevrolet Tahoe 🔎.

2021 Chevrolet Tahoe – unexpected shutdown/restart while stopped on two separate occasions, my 2021 Chevrolet Tahoe has unexpectedly appeared to shut down while I was stopped with my foot on the brake. The vehicle is equipped with auto stop/start, and initially the event seems like a normal auto stop. However, instead of a normal engine auto stop/start cycle, the vehicle appears to shut down or reset more completely. The event is jarring, and the power door locks lock/unlock as the vehicle shuts down and restarts. The vehicle subsequently restarts and I have been able to continue driving. This has now occurred twice while stopped. I am concerned that the vehicle may be experiencing an unintended stall, loss of electrical power, or another malfunction rather than normal auto stop/start operation. I checked my VIN through NHTSA and it does not currently show an open recall. I am aware that certain 2021 Chevrolet Tahoes have previously been recalled for a condition that could result in an engine stall, although my VIN does not appear to be included in that recall population.

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The contact owns a 2022 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed, the engine seized. There was no warning light illuminated. The contact attempted to restart the vehicle; however, the engine cranked for 2 minutes and indicated that there was no oil pressure. The engine cranked over after several minutes. The vehicle was taken to the dealer, where it was diagnosed with rod-bearing failure and that the engine needed to be replaced. The contact received notification of NHTSA campaign number: 25v274000 (engine and engine cooling). The engine was replaced under the recall. The manufacturer was notified of the failure. The dealer repaired the vehicle. The vehicle engine seized but was able to be driven at a reduced speed. The failure mileage was 45,059.

See all problems of the 2022 Chevrolet Tahoe 🔎.

Our Tahoe was included in the recall. The dealership inspected it, found no issue at the time, and told us to switch to a different oil viscosity, which we did. This vehicle has only ever been serviced at a Chevrolet dealership. On August 20th, while driving on the highway, the engine shut off without warning and we had to coast to the shoulder. We attempted to restart it several times, but the engine would not hold an idle. After shutting off all accessories, including the a/c and radio, the vehicle finally started. We brought it back to the dealership for inspection, and once again they could not find any issue. Today, September 14, 2026, we heard loud clanking coming from the engine. We pulled over immediately and had the truck towed to the dealership. At this point, we believe the engine is no longer serviceable and will need to be replaced. We do not believe the change in oil viscosity is an adequate fix for the 2022 to 2024 6. 2l engines covered under the gm recall, including the one in our Tahoe. An engine dying without warning at highway speed is a serious safety hazard, and we were fortunate it didn't end in a collision.

At approximately 4,200 miles, the engine on my 2026 Chevrolet Tahoe high country equipped with the 6. 2l v8 suddenly shut off while the vehicle was stopped at a traffic light. There were no warning lights, messages, unusual noises, or other symptoms prior to the failure. The vehicle would not restart and had to be towed to an authorized Chevrolet dealership. The dealership initially suspected a camshaft/lifter or related engine issue and performed diagnostic and mechanical testing. The dealer also opened a case with general motors. Gm subsequently directed the dealership to perform an ecm software update. After the update, the engine started and the vehicle appeared to operate normally. As part of the dealer's post-repair testing, a dealership employee drove the vehicle to confirm the issue was resolved. After approximately 7–10 miles, the vehicle suffered another engine failure while being driven and again became inoperable. The problem was therefore reproduced and confirmed by the Chevrolet dealership. Following the second failure, gm authorized replacement of the complete engine. The dealership has received a brand-new replacement engine and is replacing the engine and radiator. The original engine/component is currently at the dealership and may be available for inspection. I consider this a serious safety concern because the engine failed without warning while the vehicle was in use. Had the initial failure occurred while traveling at highway speed or in heavy traffic rather than while stopped at a traffic light, the sudden loss of engine power could have created a significant risk of a collision. The vehicle is a 2026 model with approximately 4,200 miles. I am reporting this because of the extremely low mileage at which the engine failed, the absence of any warning before the failure, and the fact that the vehicle failed a second time shortly after gm's initial attempted remedy.

Dfm (dynamic fuel management) system failure causing collapsed lifters, oil consumption, and complete engine failure. To repair our vehicle it will require a complete engine replacement. This has been a known issue with gm and yet there has been no recall to fix the issue. Now our engine must be replaced.

Engine seized up and needs replacement.

See all problems of the 2025 Chevrolet Tahoe 🔎.

Vehicle began making loud knocking sound xxx towed to dealer 9/8 after holiday. They found metal in the oil and believe it needs an engine replacement. A week later I have no answers, there's no loaners available, so I am just without a car. We bought car from zimbrick chevy in [xxx]. It was never disclosed to us that the vehicle had an engine replacement right before we purchased. New engine lasted about 16,000 miles. Only once we saw the history of the car in the current dealership's service app did we learn about the engine replacement. This is beyond unacceptable! information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

6. 2l engine failure: vehicle was purchased last November at 113000 miles and at approximately 127000 miles we heard a noise coming from our engine one morning. Took it to the dealer we purchased the truck from because we bought an extended warranty and they got back to us and said there were metal flakes in our oil. They dove deeper and said it was connected to internal engine failure. They told us we could keep driving it but we said no that’s too dangerous and current it’s sat 3 weeks on their lot while we figure out what the warranty company is going to do and if we’re going to be able to get a new motor from gm. I owe $40,000 on a car that is basically junk and idk what to do. When my dealer told me gm only put 21-24 in their recall I started digging and found out the entire l87 6. 2 gas platform is plagued. Please be informed that my maintenance records are also intact with regular scheduled oil changes performed by professionals. Please help!.

1 week and 1 day later we are stranded again on the side of highway going full speed in our Tahoe. We took it to two different certified chevy dealerships and they gave us a vague resolution and this issusr is not fixed at all. Our engine is locking up on us at full speed on the highway. This vehicle has 83,000 miles on it and we’ve maintained this vehicle very well.

On September 5, 2026, at approximately 7:18 p. M. Pacific time, a 2025 Chevrolet Tahoe high country equipped with the 6. 2l l87 v8 engine and approximately 18,000 miles experienced a sudden catastrophic failure while the engine was running. There were two occupants. A distinct pop was heard. The engine immediately lost power and multiple dashboard warning lights/messages began flashing. Within approximately 20-30 seconds, smoke and an electrical-burning odor were noticed. The vehicle was shut off manually and both occupants exited. Flames were first observed toward the rear of the engine compartment. The fire spread extremely rapidly, and the vehicle was substantially engulfed within approximately two minutes and completely destroyed. The sudden loss of propulsion created a crash risk, and the rapid fire placed both occupants at risk of serious injury or death. No physical injuries were reported. The precise failed component and fire origin have not yet been determined. The vehicle had received an oil change from an independent service facility within approximately 30 days before the incident. The cause has not been confirmed by gm, a dealer, or an independent fire expert. The vehicle is involved in an active insurance total-loss claim; inspection should be coordinated promptly before the salvage is released, dismantled, sold, or destroyed. More than 100 photographs and several videos taken during and after the fire are available. A fire department report is pending. Because NHTSA engineering analysis ea26005 includes 2021-2026 gm vehicles equipped with the l87 engine and later-produced engines outside recall 25v-274, please associate this complaint with that investigation and evaluate whether an l87 engine failure initiated the fire.

Driving on the interstate and vehicle started slowing down then abruptly stopped. We were able to get onto the shoulder of the road. The gear would not stay in drive mode continuing to slip out of drive and into park. We made it to a dealership in knoxville TN where we had to leave it. .

On [xxx], while driving near mammoth mountain, California (highway [xxx]), the vehicle suffered a sudden, severe engine malfunction. The engine began misfiring violently, accompanied by a loud, mechanical clacking noise, and experienced an immediate loss of propulsion power. This mechanical failure left my family—including young children—completely stranded on the side of a mountain highway in a secluded wilderness area with dropping temperatures (39°f) and active local wildlife because the vehicle could not safely maintain highway speeds or generate sufficient power, it created an immediate and severe traffic safety hazard, forcing us to secure emergency transport for the vehicle. Which took 4hours for someone to come out to the secluded hwy on a holiday weekend. Dealership diagnostic findings a formal inspection conducted by a certified general motors dealership (michael hohl motor company) confirmed the following: symptoms: gas engine diagnostic confirmed "misfire, and clacking noises coming from passenger side of the motor. " diagnosis: cylinder head / valve / lifter / lash adjuster failure. The dealership documented a collapsed lifter and recommended a complete engine tear-down to inspect lifters and pushrods for wear or bending. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The contact owns a 2023 Chevrolet Tahoe. The contact stated there was a misfire in the engine, with the engine warning light illuminated. The message “collision mitigation system off” was displayed. There was a burning odor coming from the vehicle after the failure. The vehicle started shaking abnormally. The vehicle was taken to the local dealer, where it was diagnosed and determined that the lifter and crankshaft needed to be replaced. The contact purchased a rebuilt engine, and the engine was replaced at another service center. The failure mileage was approximately 82,000.

Engine started "ticking" for a bit. Then sounded like marbles were in the engine. Loss of power and engine light came on. Dealer says my 6. 2 engine failed and new one needed. Less than 9000 well cared for miles!.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving approximately 70 mph, the message "service esc" was displayed, and the check engine, traction control, and forward collision avoidance warning lights were illuminated. The vehicle started shaking and then lost power. The vehicle was pulled over to the side of the road, parked, and then turned off. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was 118,000.

Began to accelerate to pass a slower vehicle on the highway. Just as it started to accelerate the engine abruptly shut off and the vehicle began decelerating. Many warning messages came up on the dashboard but none were present prior to the event. Was able to coast onto the shoulder of the highway before stopping. Attempted to restart vehicle but it would not restart. Vehicle was towed to the nearest Chevrolet dealership where they were able to assess that something inside the motor had failed and caused it to lock up.

The vehicle suffered complete internal engine failure due to a snapped timing chain on startup. The vehicle turned over via the starter motor but failed to start. A professional diagnosis confirmed the broken timing chain caused extensive valve-to-piston damage, requiring a full engine replacement. This failure appears to be a direct consequence of the known 6. 2l l87 v8 engine crankshaft and connecting rod manufacturing defects. Severe mechanical resistance or violent rotational harmonics at the crankshaft level place un-engineered stress on the timing drive system, causing the chain to snap under startup torque. All broken components are preserved and available for inspection. The defect creates a severe risk of sudden, total loss of propulsion while driving. Had the compromised timing chain snapped at highway speeds rather than on startup, it would cause immediate engine seizure, a sudden loss of power steering, and a loss of power brake vacuum assist. This leaves the driver unable to accelerate or safely steer out of active traffic, creating an extreme risk of a high-speed crash. The broken timing chain and total engine destruction were officially diagnosed and confirmed by professional automotive repair technicians. The damaged components have been inspected by independent repair representatives. The vehicle has not yet been inspected by general motors because this specific VIN is excluded from the current recall scope. There were no warning lamps, check engine lights, or diagnostic trouble codes (dtcs) prior to parking the vehicle, and no outward symptoms of severe engine stress were present until the complete no-start failure.

We were driving full speed down the highway and the vehicle completely shut down steering wheel locked and we were stranded for six hours. Turns out the dealer said it was just the battery and they fixed the grounding of the battery. I’m sorry but I’m not satisfied with this response. I’m scared to drive this vehicle.

Driving on the highway the engine failed at highway speeds and the Tahoe experienced a complete shutdown, we could not restart the vehicle nor shift to neutral. We had the vehicle towed and was told by the dealer that it needs a engine replacement at 14,000 miles.

I am submitting this complaint regarding my 2023 Chevrolet Tahoe equipped with the gm 6. 2-liter v8 engine. VIN: [xxx]. At approximately 40,000 miles, the original engine experienced a major failure and was completely replaced by a Chevrolet dealership under warranty. I have now driven fewer than 10,000 miles on the replacement engine and am experiencing a very similar engine-related problem again. The vehicle is currently back at the Chevrolet dealership being inspected and repaired. This is extremely concerning because the original engine failed at only approximately 40,000 miles, and the replacement engine has developed a similar problem after fewer than 10,000 miles. The gm 6. 2-liter v8 has been the subject of numerous reported engine problems and complaints, and I believe this repeated failure warrants NHTSA’s attention. I am concerned there may be an underlying or recurring defect affecting these engines that has not been adequately addressed. I am also concerned about the potential safety implications of an engine or valvetrain failure while driving. An unexpected loss of power or significant mechanical failure could create a dangerous situation, particularly at highway speeds or in traffic. I can provide dealership documentation showing the original engine replacement, the mileage at which it occurred, and the current repair visit. This documentation establishes that the vehicle has experienced significant engine-related problems twice within a relatively short period, including a similar problem with the replacement engine after fewer than 10,000 miles. I respectfully request that NHTSA document this complaint and review whether there is a broader pattern of premature or repeated failures involving the gm 6. 2-liter v8 used in 2023 Chevrolet Tahoe vehicles and whether further investigation or corrective action is warranted. Replacing the original engine did not resolve the issue, as the replacement engine has now developed a similar problem. Information redacted pursuant to the freedom of information act.

The lifters are tapping on my vehicle and the engine also has a shutter to it. I am also not getting 5000 miles per oil change by 5000 miles my vehicle is showing add engine oil and is taking 2qts to get it back showing on the oil stick.

The contact owns a 2023 Chevrolet Tahoe. The contact stated that the vehicle was taken to a dealer, where the NHTSA campaign number: 25v274000 (engine and engine cooling) remedy was completed with an oil change and oil cap replacement. Approximately three months later, while the contact's wife was driving approximately 45 mph, the engine stalled. The driver was able to coast to the side of the road. The vehicle was towed to the dealer, where it was diagnosed that the engine had failed. The engine was replaced. The manufacturer was notified of the failure, and a case was opened. The failure mileage was approximately 22,000.

A couple weeks ago, the truck suddenly started running rough and the front collision avoidance system failure message displayed. Immediately took it to the dealership. Computer read out showed #7 fuel injector failed. Repaired and was fine. Yesterday, 8/27/26, same thing happened again. Immediately went to the dealership. Now #4 fuel injector failed. Service manager just called and states that Chevrolet does not have that injector and on backorder with no date of expected delivery. No other chevy dealer has #4 fuel injectors either. Tells me that there is an overwhelming demand for fuel injectors that indicates a defect. Meanwhile, the truck is out of service and gm is not addressing the issue to replace all the defective injectors.

I experienced the issue being investigated with investigation: ea26005 I lost engine power while driving my 2024 chevy Tahoe. Gm is now conducting a full engine replacement with another l87 engine.

The number 7 dfm lifter failed and is suspected of failing due to the active fuel system. The vehicle is currently at the dealership where it was diagnosed and is awaiting replacement parts that are on GMC back order for a month or longer. The vehicle started shaking on 8/25/26 when idle and the following warning lights were visible: avs, traction control, and ecu.

We were driving on the highway and the engine started making a ticking noise and afm light came on. Took the car to the dealership for inspection and they said the lifter had collapsed and it would cost $1000 to tear the engine down to see if the camshaft was damaged. Asked for the estimate to replace camshaft and lifters and they quoted $10,000.

When vehicle is idling the cabin shaking/vibrating. When engine is warm the sound of engine goes away and when it is cool the sound and vibrating comes back.