Engine And Engine Cooling Problems of Chevrolet Suburban - part 1

The vehicle experienced an initial incident of significant engine power loss while traveling at highway speeds approximately two weeks prior to the eventual complete engine failure. During that incident, the vehicle unexpectedly lost engine power while traveling at speeds exceeding 65 mph. On Thursday, September 3, 2026, a second incident occurred within approximately one-half mile of leaving my residence. The vehicle again experienced a significant loss of engine power. I had already notified the dealership of the this occurrence and had a scheduled appointment for repairs the following day. I was attempting to drive the vehicle to the dealership as planned. Shortly after leaving my neighborhood, I stopped at a nearby gas station after the vehicle displayed a "low oil pressure" warning on the dashboard. I also subsequently received an email notification from onstar identifying diagnostic trouble code (dtc) p0016. The vehicle was then driven again and subsequently experienced a catastrophic and complete loss of engine power while traveling at highway speeds above 65 mph. Following this failure, the engine would not turn over or crank and the vehicle could not be restarted. The sequence of events is significant because the vehicle had previously experienced engine power loss at highway speeds, the dealership had been notified of the initial incident, and the vehicle was being driven to the dealership for its scheduled repair appointment when the second power-loss event occurred. The vehicle subsequently suffered complete engine failure. I am documenting these events, including the dates, circumstances, dashboard warning, onstar diagnostic notification, and sequence of failures, for purposes of establishing the history of the vehicle's mechanical problem and the circumstances leading to the catastrophic engine failure.

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Another 6. 2 liter engine failure in a 2021 Chevrolet Suburban that is not included in the original recall affecting 2021 Suburbans starting March of 2021 this on was purchased in Dec. Of 2020.

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The contact owns a 2026 Chevrolet Suburban. The contact stated that while driving at an undisclosed speed, an abnormal knocking sound was heard coming from the engine compartment, and the check engine warning light illuminated. The vehicle was driven to the contact's residence and parked. While reversing out of the driveway the following day, the engine seized, and the vehicle stalled. The vehicle was towed to a local dealer, where the cause of the failure was not yet determined. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 14,800.

Operating vehicle as usual, in drive, when engine spontaneously turned off. Alerted by system to "push button to start again" and put me in neutral. Extremely dangerous while the vehicle was in motion. This is the exact same thing I read about in a 2025 recall of 2021-2024 model year Suburbans and other vehicles. Mine is a 2022 Suburban.

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Initial indicators lead to engine failure as a result of defective part internal to the engine.

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Engine had a catastrophic failure and completely shut off while driving down the highway. The engine has completely seized and requires replacement. The vehicle was towed to an independent service shop and the technician diagnosed that the engine needed to be replaced.

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This an addendum to my original submission. Took my 2024 chevy Suburban the the dealership xxx, my engine making unusual noises. Due to the severity of the sounds vehicle was towed to dealership in [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

This vehicle has been towed approximately 7 times in the last year. For all instances in [xxx] in 2025, the dealership told us there were no issues. The completed the recall on the l87 and it 'passed'. The dealership then updated the oil to 40w and sent us on our way. We continued to have issues, but it was deemed to be the transmission. We had that relaced earlier this year. On xxx the car shut off again while driving on a highway. Upon this dealership taking a look at it, they have determined the engine has locked up for reasons under the l87 recall. I wanted to note this with the NHTSA as the recall was completed, but later found that it was not actually corrected through their guidance within the recall. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Operating vehicle normally until one day I heard a rattling noise from the engine compartment. Car had limited speed and I had to pull over to check what the issue was and the car wont start. No check engine lights, no warning. Tried turning car on but only the car starter keeps rolling. Tried jumping and it doesnt start and had to have it towed to the dealership. Car is under 55,000miles and dealer diagnosis indicates there are metal particles in the new oil after replacing oil and a loose bearing. States I will need a new engine, which is on back order and gm will only cover $44/day until repair is complete. All maintenance and oil change invervals were kept up to date. Other days when I start the car, the main hud with the speedometer does not turn on. Pitch black. . . I can drive but not know what my speed is. I had to disconnect battery and reconnect to clear the issue. It has happened several times.

Car died in middle of nowhere at high speeds.

While driving, suddenly began hearing loud knocking noise and lost most power. Was able to get vehicle off road, where it stopped, and had trouble starting again. Towed to dealer. Diagnosed issue as spun rod bearing.

My engine was initially part of the 6. 2l v8 engine recall. The dealer cleared my engine after inspecting it and told me my engine was not affected, but that I had to use corvette engine oil. After my 3rd corvette engine oil change, and two days after having it serviced and getting an all clear inspection from chevy, the engine blew while going 70 mph on the highway. No warning lights. I looked down at my dash and there was a gray box that said “engine oil pressure low, turn engine off”. By the time I checked my side and rear view mirror I could see clouds of white smoke and other cars flashing me with their headlamps. I was traveling by myself with 4 small children through a very bad part of town. It was frightening. Thankfully we were able to safely pull over and have it towed to chevy where they confirmed that the engine was blown. Chevy gave me a false sense of security when they told me my engine was not affected. I would never have put my family at risk had I known it was a ticking time bomb.

There is a safety recall on gm’s 6. 2l v8 l87 engine model years 2021-2024. My vehicle is a 2020 Suburban with a 6. 2l v8 l87 engine. My engine recently experienced the same failure as cited in the recall, but because it is outside the 2021-2024 window it is not covered by this recall. I ask that the recall be expanded to additional years where these engines are experiencing the same failure as is covered by the current recall.

The contact owns a 2022 Chevrolet Suburban. The contact stated that while attempting to start the vehicle with the push-to-start button, the engine failed to turn over. The check engine warning light was illuminated. The contact's husband was notified of dtc: p129f, which was diagnosed by the onstar app. The vehicle was towed to a local dealer where it was diagnosed with a defective fuel control module. The vehicle was scheduled to be repaired out-of-pocket. Upon further investigation, the contact associated the failure with general motors emissions recall: n252516900; however, the VIN was not included. The manufacturer was made aware of the failure. The failure mileage was approximately 39,000.

Had the recall service done , where they change the oil weight, to the 6. 2 l engine and just a few months later the engine died while driving on the highway . It just stopped running. The car is only 3. 5 years old and the engine died. They took it apart and said it was a non effected part that failed but I find that crazy. No warning just complete shut down. I was luck and only going about 30 mph on the highway due to heavy traffic. But then needed to sit on the highway for hours weighting for a tow. The kicker is the car would not go into neutral and made everything so much harder.

The contact owns a 2023 Chevrolet Suburban. The contact stated that while entering a parking lot at a low speed, the engine shut off without warning. The vehicle was towed to a dealer, where it was diagnosed with engine failure, which was associated with NHTSA campaign number: 25v274000 (engine and engine cooling). The vehicle remained at the dealer for approximately three months before the engine was repaired. The contact stated that while driving recently, the vehicle hesitated upon depressing the accelerator pedal. No warning light illuminated. The dealer and the manufacturer were not notified of the recent failure. The vehicle was not diagnosed or repaired. The failure mileage was approximately 50,000.

The contact owns a 2021 Chevrolet Suburban used to tow a 30-foot trailer. The contact stated that while towing the trailer and driving 60 mph up an incline with no shoulder, the vehicle shut off in a remote area. The contact was able to move the vehicle off the roadway. There were no warning lights illuminated. The brakes and power steering features became inoperable. The vehicle shifted to neutral without driver input. The contact stated that the failure was associated with NHTSA campaign number: 25v274000 (engine and engine cooling). The local dealer was not contacted. The vehicle was not diagnosed or repaired. A hauling company was contacted to tow the vehicle. The manufacturer was notified of the failure and opened a claim. The failure mileage was approximately 106,000.

Oil pressure acting weird. We checked the oil and there were only 2 quarts of oil in truck. I just had an oil change 3 weeks ago. No oil leaks. Engine must be burning oil for some reason.

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While coming to a stop on a highway, the engine started running very rough, shaking the vehicle constantly, and the check engine light came on and the esc failure notice came on. We brought it to an independent repair shop that ran diagnostics and recommended the vehicle needed a new engine and should not be driven for risk of it seizing. They introduced us to the fact that there was a gm recall on this particular engine and production year. Upon taking the vehicle to the local chevy dealership, they suggested that we first repair a failed cylinder lifter, but that there may also be crankshaft issues, but that it would be costly to determine this for sure and that it was likely more cost effective to replace the whole engine than approach the repairs in order. They also confirmed our VIN was not part of the recall so the replacement engine would be our responsibility. We had the engine replaced back at the independent repair shop. Given the recent recall expansion, I wanted to submit this, as it seems that a broader number of vehicles within the production years of this engine should be considered included in this recall.

The engine seized as we were driving 65mph on the highway on a family trip. Had no warning sings or any dashboard lights come on. The vehicle just put itself in neutral and we coasted down the road until we came to a complete stop. Had the recall done a year ago for it. The dealer confirmed now that it was a catastrophic engine failure.

I am submitting a safety complaint regarding our 2022 Chevrolet Suburban equipped with the 6. 2l l87 engine. The vehicle is subject to gm product safety recall n252494000 / NHTSA recall 25v-274. Our Suburban underwent gm's required recall inspection, including the picoscope inspection. The engine passed the inspection and the engine oil type was changed in accordance with gm's recall procedure. Since passing that recall inspection, we have experienced the following issues: on xxx, at approximately 40,527 miles, while we were in [xxx], the vehicle displayed a reduced-acceleration warning and check-engine light and experienced significant acceleration problems and loss of reverse. We took the vehicle to essenlohr motors, a Chevrolet dealer in [xxx]. The dealer diagnosed a p0700 condition/control solenoid stuck off and repaired the transmission valve body under gm warranty. I understand this incident was diagnosed as a transmission issue, and I am including it as part of the vehicle's recent history rather than asserting that it was caused by the l87 engine defect. The dealer's repair order documents both the check-engine condition and our report of the reduced-acceleration warning. On xxx, after we had returned home to [xxx] from our trip to [xxx], the Suburban had 41,798 miles on it. We drove approximately 2 miles from home when a “low engine oil–add oil” warning appeared. We immediately returned home and parked the vehicle. After allowing it to sit for approximately 15 minutes, we checked the engine oil and there was no oil registering on the dipstick. We saw no evidence of an external oil leak on the garage floor or underneath the vehicle. Rather than continuing to drive it, we had the Suburban towed to wiers Chevrolet in [xxx]. The dealer confirmed that the engine was approx. Two quarts low on oil and indicated that there was no apparent leaks. They performed an oil change and started a 6,000 mile oil consumption test. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

We purchased a 2023 chevy Suburban in January of 2026. In may the vehicle shut off on me at a stop light. The check engine light flashed after I was able to restart it. I took it to the dealer and they said they "couldn't recreate the issue" even though there was an engine misfire code on all cylinders. They told me to come pick it up and bring it back if I had further issues. The second time this happened I had issues getting the vehicle started. This was June 2026 once I finally got it started and was driving all the service lights started going off and the check engine light started flashing. I took it to a different chevy dealer and was told the same thing. This time I had 23 different service codes that showed up. Including the engine misfire code. So we picked it up and continued to drive it. On July 10th we were towing a 7k lb camper home when we lost all power. Thankfully we weren't driving fast and we're able to stop. This left us stranded at a busy intersection for 2 hours. The car would not go out of neutral. Had we been going 70 on an interstate we could have very seriously been hurt. The car had to be towed back to the dealership where we were told the engine locked up and needed to be replaced. My husband and I had our [xxx] child in the backseat with us. This was a family car that we purchased and told twice that they couldn't find anything wrong with it. The vehicle has been at the dealership waiting on a motor since July 11th. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Driving down xxx going back home was driving normal when SUV shut off on freeway with no warning what so ever I was 12 hours away from home almost crashed into bridge side wall was stranded on side of freeway with my whole family n my new born baby in the heat motor locked up per dealer 74k miles had to pay tow truck n a rental to get back home information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

In 2025, one if the pistons misfired. It was repaired and the same issue occurred a year later causing the cam shaft to break as well. Not to mention we had an electrical failure where the dashboard didn’t work and the water pump failed right after it was in for the first piston misfiring. It was repaired at ciocca Chevrolet in [xxx]. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The contact owns a 2019 Chevrolet Suburban. The contact stated that while driving at an undisclosed speed, the vehicle was shaking with the check engine warning light illuminated. The contact pulled over and had the vehicle towed to the dealer. The dealer diagnosed a cylinder misfire and determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 124,818.

The contact owns a 2026 Chevrolet Suburban. The contact stated that while driving approximately 45 mph, there was a popping sound coming from the vehicle and the vehicle stalled. The vehicle failed to restart. The vehicle was towed to a dealer where it 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 failure mileage was approximately 1,700.

My 2023 Chevrolet Suburban equipped with the 3. 0l duramax diesel engine (lm2) has experienced a recurring engine oil leak involving the rear main seal/lower timing cover area. The vehicle has required repeated dealer repairs for substantially the same oil-leak condition, including major engine-related disassembly, but the leak has returned after repair. This is a safety concern because failure of the rear main seal or lower timing cover sealing system can result in loss of engine oil while the vehicle is being operated. A significant oil loss could potentially cause loss of oil pressure, engine damage or engine failure and resulting loss of propulsion while driving. Leaking engine oil also has the potential to contact hot engine or exhaust components, creating an additional safety concern. The problem has been inspected and confirmed by authorized gm dealerships and documented on multiple repair orders. This does not appear to be an isolated occurrence on this vehicle because substantially the same engine oil leak has required repair more than once. Gm has previously issued service information, including bulletin pip5795, concerning rear main oil leaks on 3. 0l lm2 duramax engines where the rear main oil seal may move or become severely shifted out of position in the timing chain lower cover. I am concerned that repeated repair of this condition may not adequately address the underlying cause and that the oil leak could recur while the vehicle is being driven. I am requesting that NHTSA review complaints and repair data involving rear main seal/lower timing cover oil leaks on gm 3. 0l duramax-equipped vehicles to determine whether a broader safety-related defect exists.

My 2023 Chevrolet Suburban premier is covered under gm recall 25v-274 for the 6. 2l l87 engine defect (loss of propulsion from connecting rod and crankshaft failure). In xxx, the dealer notified me my vehicle required a full engine replacement under this recall. Wareing sheridan Chevrolet in [xxx] replaced the engine, and the vehicle was out of service approximately 12 to 14 days. Approximately 6,000 miles later, on xxx, the replacement engine failed while I was driving on the interstate highway near billings, montana. There were no warning indicators of any kind until I suddenly lost power. Only at the moment power was lost did the check engine light come on and a low oil pressure warning appear. I was barely able to get the vehicle off the interstate before it died. I had my family in the vehicle, and losing power on the interstate with no warning created a serious risk of a crash. The vehicle had to be towed to denny menholt Chevrolet in billings, mt. On June 13, 2026, the dealer confirmed the vehicle needs a second complete engine replacement under the same recall. This is the second l87 engine failure and second full engine replacement on this vehicle under recall 25v-274. No crash or injuries occurred. I have an open case with gm (#xxx). Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The engine of this car has been under recall for multiple issues during the time we have owned it. The most recent issue that was experienced was total engine failure and electrical malfunction while driving on a busy street near train tracks. The vehicle was making a loud banging sound moments before this occurred. I wasn't even given time to get to a safe spot to investigate the issue. When it shut down, a quick message flashed across the dash board--stating ability to shift had been lost (or something to that effect)--the vehicle then flipped into neutral and immediately lost power. My safety was put at great risk due to the fact that the entire vehicle shut down moments after I crossed over a very busy railway track. The vehicle had to be towed to a nearby Chevrolet dealership where it has been confirmed there was total engine failure as well as blown main electrical fuse.

Valve spring broke at approximately 5200 miles. Dealer replaced the head.

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Vehicle stalled during routine driving. Code p129f. I was stranded in 95 degree weather with three small children. Please correct and advise ASAP. Had to be towed home. Vehicle inoperable.

Car shut off in the middle of the road while driving and auto braked. Had to get a tow. Dealership said engine is bad now.

When I first got this vehicle 2019 brand new off the lot the dealership in newark ohio had to completely rewire it. It took them a month to figure it out. I just replaced the transmission and now the engine is out. A piston rod snapped hit both sides an cracked the sides and the oil pan.

The contact owns a 2022 Chevrolet Suburban. The contact stated that while driving at highway speeds, the vehicle shut off while displaying "service transmission now unable to shift soon" and "engine power is reduced" warning messages. The vehicle was towed to a dealer where it was previously inspected under NHTSA campaign number: 25v274000 (engine and engine cooling); however, no repairs were performed. After remaining at the dealer for nearly eight weeks, the engine was replaced under warranty. A few weeks after the replacement, the same warning messages were displayed on the instrument panel upon startup. The contact attempted to drive the vehicle; however, the vehicle failed to exceed 20 mph and was towed back to the dealer. While attempting to drive the vehicle into the service bay, the technician experienced severe hesitation and engine stalling. During diagnostic testing, a large amount of metal shavings was discovered in the oil filter, and the vehicle was diagnosed with the same engine failure as before. The vehicle was repaired; however, the contact refused to take possession of the vehicle due to safety concerns. The manufacturer was notified of the failure, and a case was filed. The failure mileage was 61,000.

The contact owns a 2022 Chevrolet Suburban. The contact received an unknown recall. The contact stated that the vehicle was taken to the dealer, and while parked at the dealer, it was determined that there were metal shavings in the oil and that the engine needed to be replaced. The vehicle was repaired, but a failure occurred 4,000 miles, two months later. The contact stated that while driving 55 mph, the vehicle lost power and then stalled. The vehicle stopped in the middle of the highway and was inspected. The vehicle was then towed to a different dealer where it was diagnosed and determined that the engine had failed and needed to be replaced. The vehicle was not yet repaired. The vehicle was towed back to the dealer where it was diagnosed and determined that the engine needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was approximately 53,000.