Engine And Engine Cooling Problems of GMC Sierra 1500 - part 2

My truck engine has failed due to metal shavings in the oil related to the l87 engine recall, and the failure occurred after gm had replaced the truck’s oil as part of the recall remedy. The recall remedy did not prevent the failure of the engine.

See all problems of the 2024 GMC Sierra 1500 🔎.

I again have noticed intermittent pulsing at low to medium speeds. At roughly 1k-2k rpm the engine at or about 10-20 mph is pulsating or hesitating with an obvious pulse which you can see on the tachometer as well (bouncing. ) it seems like there is either a computer, fuel flow or electric issue. Also, at speeds up to the 40 mph range, this is happening as well. Yesterday while towing a small 7'x12' empty dual axle trailer I noticed it again, I occasionally use my trailer to haul small loads up to 4500lbs. This has happened before but this time I decided to notate this on your site, since reading about ongoing problems with the 2020 6. 2l GMC Sierra 1500. I was aware of the other following years, 2021-2024? issues and that is why I purchased this 2020 year model. My truck will be available for inspection when the request is sent to me. Safety was not an issue, I ran my truck most of the day. I have not yet notified my Chevrolet dealer, roger dean, cape coral, FL. My truck has not yet been inspected for this issue. There were not any lights or warnings on display at time of incidents. Thank you, [xxx] [xxx] [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2020 GMC Sierra 1500 🔎.

Catastrophic engine failure the connecting rod went through the block. It is my understanding that defective components: manufacturing defects in the connecting rods and crankshafts can reduce oil film strength, leading to severe wear, metal debris, and catastrophic engine could be the proiblem.

See all problems of the 2021 GMC Sierra 1500 🔎.

On may 27, 2026, I was on my way home from work when I went to accelerate the vehicle and all the sudden it started shaking and the check engine light came on with the ebs. I was able to get the vehicle to a repair shop local the next day, who took the car apart. What was thought to be an easy fix of spark plugs and fuel injector, became even more after they put back together and the cylinder was still misfiring. After several hours of taking apart the engine, the mechanic determined that the hydraulic valve lifters had failed. This has been an ongoing issue with with the 5. 8l v8. Due to a recall not being under the VIN yet, I have now incured a $16k expense to add an engine to it after I purchased it in Nov of 25 at $97,000. This is a saftey issue and luckily no one was hurt when the car started shaking and couldn't go over a certain speed. I want this reviewed and looked at for possible reimbursement as there have been several other vehicles with the same known issue.

See all problems of the 2019 GMC Sierra 1500 🔎.

While driving on the highway, the steering became much more stiff, and then I heard metallic clanging sounds for a few seconds. The dashboard said press start to start vehicle. I pressed start while going 30 miles an hour and all lights and instrument clusters went black. I pulled into the grass median where the truck would not start or shift gears. Truck was towed to a GMC dealership.

In normal operation on Tuesday may 26,2026, the engine experienced catastrophic failure. The engine is the gm l87 6. 2 liter. This was on a highway in the country and I was able to maneuver the truck off the road before an accident occurred. It did leave me stranded and I was required to get it towed on a roll off (it was not drivable) to the dealer where I purchased it. The dealer [xxx] ) inspected my truck and has informed me that the issues with my 2025 sierra match the issues for the recall gm had for the model years 2021-2025. It will require a new engine, radiator, among many other parts. There weren't any previous warnings. A check engine light only came on once the engine was engine came apart. An oil change on the vehicle by gm was done a month ago. The truck is a 2025 and has approximately 6,600 miles is all. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2025 GMC Sierra 1500 🔎.

My truck has completely shut down/ loss power on several occasions. Happened when I was l slowing down or completely stopped. Everything goes dark. Had to wait several minutes before truck would start.

The lifters on my 2023 GMC sierra failed and damaged my engine. The truck has approx 78,000 miles. I do have an extended warranty to 100,000 miles. I got the truck to my GMC dealer who confirmed the problem was lifter failure. There might be camshaft damage but will have to tear the engine down. It seems like GMC is dragging there feet. It is known the lifters are a problem on this engine but GMC continues to sell them. There was no warning that the lifters would fail. The lifters could have failed while driving at high speeds and the driver could loss control.

See all problems of the 2023 GMC Sierra 1500 🔎.

I was driving, suddenly my truck is dead. I got it tow to gm dealership for weeks. The technician diagnose and said I need a new engine replacement. My truck is only 148k.

On November 20, 2025, my 2022 GMC Sierra 1500 at4 equipped with the 3. 0l duramax diesel engine began experiencing intermittent engine overheating conditions. Concerned about a potential safety issue, I contacted a GMC dealership and was advised that because no diagnostic trouble codes were present, there was nothing to diagnose or repair and that I should continue driving the vehicle. Over the following months, the overheating condition continued intermittently. On may 24, 2026, while driving on the highway, the vehicle suddenly overheated, displayed fault code p1098, and entered reduced power ("limp mode"). The vehicle lost normal performance and acceleration while traveling in traffic. This created a significant safety hazard because the vehicle was unable to maintain normal highway speeds, increasing the risk of a rear-end collision or other traffic accident. The loss of power occurred while driving and without sufficient warning, leaving the vehicle unable to safely perform as expected in highway traffic. After researching this issue, I found numerous reports from other GMC and Chevrolet owners describing similar overheating, coolant control valve, thermal management system, and p1098-related failures. Many owners report symptoms involving engine overheating, reduced engine power, and limp mode operation while driving. I am concerned that this may indicate a broader defect involving the vehicle's cooling system and thermal management components. The vehicle exhibited overheating symptoms for approximately six months before the final failure occurred. Additionally, I understand that certain gm vehicles have been subject to service actions involving coolant control valves and thermal management system components. Given the similarity of symptoms, I am concerned that the overheating condition reported in November 2025 may be related to the same type of failure mechanism, yet my vehicle has not been included in any recall or special coverage program.

See all problems of the 2022 GMC Sierra 1500 🔎.

Good evening, I want to formally document what happened today regarding my GMC sierra after I brought it to the dealership on Friday morning for transmission concerns that I had already reported. At that visit, the vehicle was inspected, and I was informed that the truck was still safe to drive while waiting for the extended warranty approval for the replacement parts that were needed. Unfortunately, today my family and I experienced a very serious and frightening incident on the expressway. While driving, the truck suddenly lost power, barely moved forward, and began shaking violently. We were placed in a very dangerous situation in traffic and struggled with great difficulty and fear just to make it home safely. Once we arrived home, the vehicle completely shut off and would not restart again. This situation was extremely alarming, especially because I had already reported the transmission problems and trusted the guidance given to me that the vehicle was still drivable. My family’s safety was put at risk, and I need this matter to be treated with urgency and seriousness. Please advise immediately on the next steps regarding the vehicle, towing assistance if necessary, and how this situation will be properly addressed. Thank you.

Heard clanging noise under hood as I was driving and truck just stopped. Tried to restart and nothing! towed to dealership where they found the engine has to be replaced.

Truck starting bottom end knocking noise at 57,700 miles. Engine had the recall done to it for pico test and passed. Dealership states now it will need a new engine.

This vehicle has experienced repeated catastrophic engine and drivability failures since purchase and has now undergone four engine replacements under warranty. Despite these major repairs, the vehicle continues to experience dangerous shutdown/stalling conditions. The primary safety issue occurs while braking or coming to a stop. The engine will suddenly shut off unexpectedly, creating a serious traffic hazard and leaving the vehicle unable or difficult to restart. This has occurred multiple times and creates a dangerous situation in traffic and at intersections. The vehicle remains under manufacturer warranty, however the defect has not been successfully repaired despite extensive service attempts and multiple complete engine replacements. The condition substantially impairs the safety, reliability, and use of the vehicle. This vehicle was acquired through a fleet/lease arrangement for company use and was not purchased for resale. It is a light-duty 1500-series pickup with approximately 7,100–7,200 gvwr used as a company vehicle. Complete repair history, diagnostic records, warranty repairs, and engine replacement documentation can be obtained from: stevens GMC bristol, connecticut the vehicle has been repeatedly presented for repair and the defect remains unresolved. This appears to be a serious ongoing safety-related defect involving engine shutdown/stalling while braking or stopping.

I was driving on interstate 95 at approximately 70 to 75 mph when I lost all power and compromise steering with tractor trailer behind me god willing I was able to pull over to the shoulder. My safety was compromised and I lost all faith in GMC. My vehicle has been out of service for 27 days at this point while waiting for an engine replacement with no eta on service. According to pennsylvania lemon law after 30 days a lemon law claim can be submitted.

Coolant control valve.

Engine failure at 12,000 miles.

[xxx] [xxx] phone: [xxx] vehicle information: year: 2023 make: GMC model: sierra denali ultimate engine: 6. 2l v8 VIN: [xxx]: mileage: approximately 52,000 miles background: I previously had the engine serviced under a gm recall campaign related to known 6. 2l v8 engine concerns. Despite that repair, the vehicle has since experienced two separate highway-speed loss-of-propulsion events. Complaint the vehicle suddenly lost power while being driven at highway speed. No warning lights, check-engine lights, reduced-engine-power messages, or transmission warnings appeared. In both incidents, I was forced to coast to the shoulder of the roadway. The vehicle would not resume normal operation until it was stopped and restarted. This condition has now occurred twice. Safety concern the sudden loss of propulsion during highway operation creates an immediate safety hazard and increases the risk of collision due to the inability to maintain speed with surrounding traffic. Requested NHTSA action 1. Record this complaint as a repeat loss-of-propulsion event. 2. Evaluate whether similar complaints exist involving 2023 GMC sierra denali ultimate vehicles equipped with the 6. 2l v8. 3. Consider this complaint in any current or future investigations involving loss of propulsion, stalling, engine failure, or powertrain concerns. 4. Review whether vehicles previously repaired under gm recall campaigns continue to experience similar failures. [xxx]: update – vehicle disabled and awaiting engine replacement since filing my initial concerns regarding repeated loss-of-propulsion events, the condition of my vehicle has significantly worsened. During the dealership's inspection and test drive, the engine reportedly failed and locked up. The vehicle could not be restarted and required further diagnostics. On June 20, 2026, I received a text message from the dealership that the required engine parts remain on backorder information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Engine failure after passing pico test. Engine completely locked up on a busy highway without the ability to even put it in neutral. Yes, confirmed by dealer that there were metal shavings in the fluid. Inspected by authorized dealer. No lights came on in the vehicle prior to the engine failure.

After driving my vehicle for a short period of time I stopped to go shopping. When I returned to my vehicle I started it as usual and the check engine light illuminated. I began driving and within 0. 25 miles I received an info enter message that stated my vehicle would have reduced acceleration and to please drive safely. My engine fans became noticeably louder and ran the entire trip home (about 15 minutes). After pulling into my driveway I sat in the vehicle and listen to the fans continue to operate. Additionally, my onstar system, wifi, and navigation systems quit working. A p1098 code was returned when using a diagnostic code device. Disconnecting the battery would cause the check engine light to extinguish and for the truck to operate without reduced acceleration; however, onstar, navigation and wifi would not work. After shutting off the engine and then restarting the check engine light would once again illuminate and the reduced acceleration message reappeared.

The contact owns a 2019 GMC sierra ld 1500. The contact stated that while driving approximately 65 mph, the vehicle, went into low power mode, and was able to move safely to a and then the vehicle stalled. The vehicle was towed to an independent mechanic and was diagnosed as the engine has no compression, suspect a possible crankshaft failure, also a possible engine replacement. The manufacturer was notified of of the failure. The contact associated the failure with NHTSA campaign number 25v274000 (engine and engine cooling). The approximate failure mileage was 130,000.

The contact owns a 2026 GMC Sierra 1500. The contact stated while driving 40 mph, the vehicle independently engaged into limp mode. A dealer was contacted. The vehicle was towed to the dealer where it was diagnosed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not notified on the failure. The approximate failure mileage was 10,000.

6. 2l crankshaft failed.

On may 13. 2026 traveling southbound on i15 utah at 75 mph the engine stop and put the tranmisson in n and I move the truck to a stop. Then the truck shut down. I had the truck tow to the nearest GMC and was informed that the engine had sezed. I had recalled done to pervent engine failure.

I was on my way home from work and everything was driving fine and then I got 1/4 mile from my house and the motor started making a very loud grinding sound. I could barely accelerate. The issue happened out of nowhere. No issues prior to this happening. I was driving about 40 miles an hour when the issue started and I limped it to my driveway, luckily I was not very far away. I have a 3 month old baby and this was my reliable family vehicle. Who’s to say what could have happened if I was driving at a higher speed with my child in the car. When it happened it started shaking really bad. I checked everything that I could. It sounded like my motor was starving for oil. I decided to go ahead and change my oil to see if that could have been the issue. I had just changed the oil approximately 2000 miles before this. I changed the oil and filter. Went to start it up and still same very loud grinding sound, shut it back off and have not started it since cause I’m afraid to damage it further. I checked the oil that I drained out of it and looks like small metal flakes in the oil. No warning prior to this happening. Just out of no where it sounds and felt like my motor was going to blow.

The contact owns a 2019 GMC sierra. The contact stated that while driving at 20 mph, the check engine light began to flash. The driver pulled over. The vehicle was knocking. The contact stated that failure was due to premature engine failure. The vehicle was towed to the local dealer, where it was diagnosed with a cylinder 3 lifter malfunction. The vehicle had misfired. The vehicle was not repaired. The manufacturer was notified, but no assistance was provided. The failure mileage was approximately 77,000.

2020 GMC Sierra 1500 began experiencing a slight knocking sound - mechanic diagnosed as a crankshaft issue. As of last night, 5/10, the truck's knocking sound got extremely loud, the exhaust pipe emitted smoke, and the truck began "bucking. " no warning messages or lamps appeared.

• while driving a loud popping and clicking noise started coming from the engine and the truck started shaking. The vehicle is available for inspection • it was a busy two lane road and I had to continue about 30mph under the speed limit to safely get off the roadway • upon start up the engine clicks and pops with rough idle and the truck shakes. A mechanic looked at it and stated it sounds like a lower rod bearing noise • no further inspections have been done • a service esc warning popped up when the engine started making noise during the incident. The truck had been taken in twice for rough idle and engine noises prior to 100k miles, but the dealership stated that the noise and feel was normal for the 6. 2l engines.

Traveling northbound in the left lane on [xxx] approximately 1 mile prior to the [xxx] exit. I increased my speed to move to the right lane and exit. After moving the the right lane and signaling to exit the highway a notification appeared on the gauge cluster stating to shift to neutral and restart the engine. After coming to a complete stop at the stop light I attempted to restart and nothing happened. I contacted onstar for roadside assistance to get my truck and trailer towed and was informed they do not cover towing of the trailer. I accepted the tow of the truck and contacted the towing company who charged me $300 to tow my trailer 15 miles home. This happened late morning on Saturday and by Monday evening I was informed my engine seized and gm will be covering a replacement under warranty. My truck is less than two years old with 23k miles. The 6. 2l engine was inspected a couple months earlier for the engine recall and was deemed ok. Clearly the inspection process is not very robust. I was told I could be without my truck for 1wk, 2wks, a month, but they are not sure since I’m 4th in line for a new engine and the truck first in line has already been there a month. I was also told gm is showing inventory in michigan but the engines are not shipping. I’m currently waiting on a loaner vehicle but was told I cannot tow with the loaner vehicle which throws a wrench in my plans. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The engine blew.

15000 miles and the engine spun a bearing and the engine blew.

Engine coolant control valve position sensor minimum stop performance, and chevy recalled this on this same motor and GMC needs to pays for this as it’s a major problem!.

6. 2l v8 engine. 2020 build, GMC Sierra 1500 series. Same engine in the existing recall for 2021-2024 models. Received a call from the service department of the dealership that after changing the oil and restarting the truck to reset the oil change indicator the engine shut down. Assistant service manager, stephen poulson [xxx] ) called and provided information that the engine seized and that the technician cannot manually forward or reverse the engine with a breaker bar. According to the technician, this is indicative of a catastrophic failure consistent with the existing recall. The vehicle is currently at carr vancouver Buick GMC and is available for inspection. Nhtsa has permission of this owner to inspect this vehicle involved if they choose. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Sitting at a red light and when the light turned green, the engine made a noise and lost power while trying to cross the intersection. The check engine light came on along with some other lights. It was then towed to a mechanic and the engine had to be replaced due to failure of the lifters. The mechanic said it is a common issue with the gm 5. 3 engine but unfortunately their has not been a recall.

After the vehicle was purchased in October 2023, it immediately had an issue shifting very hard. After numerous trips to the servicing dealership in attempts for error codes to be discovered with no success, the dealership gave the recommendation to flush the transmission as this was a fix for this type of engine in November 2024. The transmission was completely flushed in November 2024. The vehicle continued to have the issue with hard shifting and also developed less efficient gas mileage and would misfire upon ignition and there was a constant knock when running. After a prominent ticking began in may 2026, it was discovered that the timing chain was broken and we were told the rods could impale the engine and go through the hood if the engine was not replaced. The engine had completely failed and needed to be replaced including radiator and hoses. The engine, radiator, and hoses were replaced 05/2026. The invoices for both of these service transactions are attached. After much research and advice, it appears this issue was the same issue that was happening with the other 6. 2l l87 engines from the years 2021 to 2024 that were recalled.