2019 GMC Sierra 1500 complaints

TSB 19-NA-121. My truck is experiencing the exact issues detailed in the listed TSB. Randomly and quite often my truck feels like I am running over speed bumps. This just started about 3 days ago. The truck has been maintained. Oil is changed on time and there was a 100,000 mile service and I just had a 150,000 service done. Currently there are roughly $148,000 miles on the vehicle. Is there a way to have GM cover the costs of the repairs even though my VIN# was not listed. Also I am experiencing sudden power loss which is also mentioned in other bulletins. Basically it feels like the engine hesitates to accelerate.

Engine failure at random while operating. Dealership stated vehicle blew engine block fuse and crankshaft is now seized.

Total engine power loss while driving 70mph on the highway in steady moving traffic causing a safety hazard, with 3 young children in the vehicle. No prior warning lamps, messages or symptoms to indicate a problem. Engine completely shut down while driving and will not turn back on. Had vehicle towed to the dealership. Certified GMC dealership did a full inspection and indicated that the engine assembly needs to be fully replaced. NHTSA Campaign 25V274 for vehicles 2021 and newer is for the same exact engine failure issue with the same engine size. I would appreciate you exploring the possibility of covering this catastrophic malfunction as an exception to the aforementioned recall campaign. Many other drivers have noted the same failure with the 2019 as was included in the recall for 21-24. Thank you for your consideration, please feel free to reach out to me directly to discuss further. I look forward to hearing from you!

Experienced the GMC shudder while driving on the highway. This is a known issue with GMC transmissions valve bodies and torque converters. I would like to know why my vehicle is not on the recall list 2019 GMC? 85,000 miles and has always shifted hard randomly when cold but was unaware of the problem until this shudder became an issue and started looking into it.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at 25 MPH, the check engine warning light illuminated, and the engine started knocking. The contact pulled over immediately and contacted an independent mechanic, who recommended continuing to continue driving at a slow speed. The contact resumed driving to the residence. The contact's son, who was a highly skilled mechanic, diagnosed that the left bank lifters had failed. The vehicle was not repaired. The dealer was contacted several times and informed that the VIN was not included in a recall and referred the contact to the manufacturer for assistance. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 83,000.

The engine went into limp mode as I made turn leaving the damn I was is in town and it was a lot of traffic could’ve been bad if I didn’t pull into the median left me devastated and no crank no start I’ve only had the truck a year it went down a month from when I purchased it

I am writing to formally log a safety concern regarding my vehicle’s 6.2L L87 engine, specifically in relation to the known defects under NHTSA’s ongoing Engineering Analysis EA25007 (previously Preliminary Evaluation PE24004).While my vehicle is currently running and has 52,000 miles on the odometer, it falls squarely within the manufacturing window being investigated for premature engine failures due to defective connecting rod bearings and Dynamic Fuel Management (DFM) lifters.My primary concern is the severe safety hazard presented by a sudden, catastrophic engine failure. A sudden seizure or loss of motive power at highway speeds puts myself, my passengers, and other drivers at an immediate risk of a high-speed collision, especially if it occurs without prior warning lights or symptoms.Because GM’s previous engine recalls (such as 24V-418) excluded the 2019 model year despite utilizing the same vulnerable engine family, I am filing this report to urge the NHTSA to expand the recall to include 2019 models. I want my vehicle's VIN documented as part of this vulnerable population so that a proactive, permanent remedy can be mandated before a dangerous highway failure occurs.

I believe I had a lifter failure as I was traveling up SR 393. Safety issue as vehicle lost power. Vehicle is at dealership now and confirmed possible lifter collapse. No dashboard lights were on or any power issues prior.

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving at 55 MPH, the vehicle made an abnormal rumbling sound and stalled. All the warning lights illuminated. The vehicle was taken to a nearby independent mechanic, who determined that the engine lifter and cylinder had failed. The vehicle was not repaired. The local dealer was not contacted. The manufacturer was contacted and confirmed that there was no recall coverage. The manufacturer referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 98,003.

Lifters (the part that opens and closes engine valves) fail prematurely. There was a loud ticking noises, rough idling. Took to dealership and they advise that yes the lifters are failing and not drivable at this time.

I am retired and have always bought GM vehicles which are taken care of with required oil changes etc. This one I have only owned 25,000 mi each year (I have owned two years). So, when purchased it has high 50,000 miles not sure of exact, and it has only been driven 2 years. When calling escalation at GM, they act as though it doesn't matter and too bad. 110,000 miles and the truck needs a new motor. This is what we are told and 10,000 more than the initial 1500 to tear it down. This truck is not broken due to us, this is a problem with the manufacturer and the responsibility needs to be addressed. My husband has a heart issue and he almost didn't make it home. I'm not accepting that nothing be done, since next we need a lawyer and a media appointment. This isn't right when you see thousands of people with the same GMC Sierra trucks online with complaints of the same valve and motor issues. This needs completely replaced and not by a customer, by the manufacturer. How can 1500 people new wrong on one sight stating the same as we have had. This person who is responsble for reporting and making sure we are safe needs to be fired. I am writing my representatives, senators etc to let them know this is going on. No one should pay for the mistakes of bad engineering. PERIOD.

No warning lights, engine stalled in the middle of the freeway almost got killed by a semi truck was behind me, engine lost power and found that needed new engine because of the camshaft and internal damage.confirmed by certified mechanic

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving 75 MPH, the message "Engine Power Reduced" was displayed and the vehicle decelerated and stalled. The vehicle was pulled over onto the shoulder and failed to restart. Roadside Assistance was called to the scene, and the vehicle was towed to the local service center, diagnosed, and it was determined that the engine Cam Actuator screws had failed causing metal shavings to enter the engine and turbo. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer and local dealer were notified of the failure. The failure mileage was 95,000.

On [XXX], my 2019 GMC Sierra 1500 Denali equipped with the 6.2L engine suffered a sudden loss of power while driving. The vehicle lost propulsion and could not continue operating normally. The vehicle was taken to Orange Buick GMC in Orlando, Florida. The dealership advised that the engine is locked and unable to rotate manually, and that the engine requires replacement. The vehicle has approximately 126,000 miles. This failure occurred while the vehicle was being driven and created a safety concern due to sudden loss of propulsion. A sudden engine lockup or loss of power could increase the risk of a crash, especially if it occurs in traffic, at highway speed, while turning, or while crossing an intersection. There was no crash, fire, injury, or death. The vehicle remains at the dealership awaiting repair. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Engine fail due to lifters collapsing, had a really bad lifter on #3 and #2 and cause to chew out camshaft . Needed a new engine and gm didnt wanna honor it warranty only partial .

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.

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.

While towing Jetski's the #2 Cylinder has a persistent misfire. Was able to limp to Chapman Chevrolet where it took 2 days to diagnose. Vehicle is below 70K, which just recieved a brand new transmission and torque converter due to metal shavings from converter getting pushed through to the transmission. Service Advisor's Message below: "Performed further diagnosis and requested engine teardown to determine root cause of misfire. During disassembly, found cylinder #2 intake/exhaust valve train failure, including a bent pushrod and a severely scored/collapsed lifter. Inspection revealed the damaged lifter had caused abnormal contact with the camshaft lobe, resulting in significant scoring and wear of the camshaft. The failed lifter and bent pushrod led to loss of proper valve operation and cylinder misfire. Point of failure is lifter #2 that resulted in camshaft failure as consequence. I am in the process of generating a quote and taking pictures for the extended warranty." Seems like another AFM/DFM issue has brought down another GM Motor. Why are these motors not part of the recall, when they are going down the same was as the recall? My safety and my family were put at risk for a possible catastrophic failure and loss of power due to the engine being faulty. There were no warning laps, just Check engine Light, Parking Break Wrench Light. The only other sign was a quite tick that is with most Chevy/GM Motors.

Vehicle lost power and shut down while driving at 60 mph, would not restart

Transmission blew on a 7 year old vehicle. Was replaced entirely and is NOW having the EXACT SAME PROBLEM AGAIN!

The contact owns a 2019 GMC Sierra 1500. The contact stated that the trailer lights flashed intermittently while the vehicle is turned off. Additionally, the contact stated while driving with a trailer hitched to the vehicle, the messages "Trailer Disconnected" and "Trailer Connected" were intermittently displayed, and the running and marking lights were inoperative. The contact related the failure to GM TSB Numbers: 20-NA-198 (Trailer Running Lights Shut Off Due to Excessive Load on the Running Lamp Circuit), PIT5747B (Diagnostic Tip - Trailer Lighting Complaints with Trailering App RPO U1D) and N192213550 (Service UpdateTrailer Integration Module Software Error). The vehicle was taken to an independent mechanic, where it was determined that the failures were due to a wiring or software failure. The contact was informed that the failure was a factory defect because the fuses were in good condition. The vehicle was not repaired. The dealer and the manufacturer were not contacted yet. The failure mileage was approximately 64,000.

Back window water leaking causing bad smell and mod

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.

While driving, the vehicle suddenly began running rough, losing power, and displaying engine warning lights. Due to the severity of the issue, the vehicle was towed to a GMC dealership for diagnosis. The dealership diagnosed lifter failure and a cracked cylinder head. The dealership also documented coolant intrusion, oil/coolant contamination, and evidence of internal engine damage. Repairs were attempted, including replacement of the cylinder head and lifter. After the repairs were completed, the vehicle never left the dealership because it continued misfiring on the same cylinder. GM later determined the engine had a failed piston ring and scored engine block requiring complete engine replacement. The vehicle has approximately 55,000 miles, has been properly maintained, and was purchased new. This catastrophic engine failure resulted in loss of power and major internal engine damage at relatively low mileage. I also opened a case directly with GM Customer Assistance regarding this failure. The case involved multiple escalations after the initial repair attempt failed and the vehicle ultimately required full engine replacement. GM ultimately advised that only partial assistance toward the engine replacement would be provided, leaving the customer responsible for a significant portion of the repair cost. I am submitting this complaint because this vehicle appears consistent with the ongoing NHTSA investigation involving GM 6.2L L87 engine failures and loss of motive power.

Engine component failure. If not identified early could have caused catastrophic failure being disabled in traffic. This problem has been diagnosed and confirmed by a certified GM dealership. Initial warning sign was a knock in the engine, no warning lamps. First identified on 9/2/25 at 80,345 miles. Dealership changed oil to a higher viscosity. Problem gradually got worse, diagnosed #3 cam lobe failed 3/9/26 at 85,437 miles.

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.

I was driving my 2019 GMC and all of a sudden I pulled into a subdivision the vehicle shut off and would not start again. I wasn't given an y warning or heard any sounds it shut off and would not start up again. I checked the battery and it was fine. I had it towed to a mechanic shop. They replaced the starter, and the battery module. after that they ran codes and the codes were P00C6 and P0340. I had it towed the the local chevrolet dealership and they told me I needed to have the engine replaced, however they don't have any engines available or know when they would be able to get one.

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.

The 2019 vehicle experienced a significant engine failure consistent with widely reported issues involving GM 6.2L V8 engines in GMC Sierra and Chevrolet Silverado platforms. Prior to failure, the vehicle developed abnormal engine noise including ticking/knocking sounds, followed by loss of engine performance and mechanical failure. Vehicle diagnosis indicated internal engine damage requiring major repair or full engine replacement. The failure occurred despite normal maintenance and relatively low mileage for a modern full-size truck. The vehicle had no prior abuse, modification, or racing use. Based on technician feedback from December 2025 service call and publicly reported incidents, the failure appears consistent with commonly reported GM 6.2L issues involving: connecting rod bearing failure crankshaft/bottom-end damage lifter or valvetrain failure internal metal contamination sudden engine seizure or loss of propulsion This issue presents a serious safety concern because sudden engine failure can occur during normal roadway operation, potentially resulting in: sudden loss of power inability to accelerate vehicle shutdown while driving increased crash risk in traffic conditions I am aware of numerous similar complaints involving GM 6.2L V8 engines across multiple model years, including investigations and recalls affecting related vehicles and powertrains. My vehicle appears to exhibit the same or substantially similar failure characteristics. I request that NHTSA continu

I own a 2019 GMC Sierra 1500 Denali equipped with the 6.2L L87 engine. On or around December 31, 2025, the vehicle developed a loud knocking noise from the engine that became worse with RPM increase. The truck was taken to a GMC dealership for diagnosis and repair under warranty/service contract coverage. The dealership initially diagnosed valvetrain-related failure and replaced multiple top-end components including lifters, rocker arms, camshaft-related parts, belts, pulleys, hoses, and associated hardware. After reassembly, the engine reportedly started briefly and then failed again. The dealership then performed additional teardown and determined the lower end of the engine had also failed. I was informed by dealership staff that rod bearing failure is “very common” on the L87 6.2L engines. Due to the extent of the damage, the vehicle ultimately required a complete long block replacement. My truck remained out of service from approximately 12/31/2025 until 5/1/2026, a period of roughly four months. During that time, there were repeated delays involving diagnosis, inspections, warranty approvals, and additional teardown procedures. The vehicle had approximately 111,858 miles at the time of failure and had been regularly maintained. Prior to the engine failure, the truck exhibited abnormal engine ticking/knocking noises under load and higher RPM operation. The final repair performed was replacement of the engine long block assembly. I am submitting this report because the de

I am getting warning signs on the dashboard saying that my brake booster performance has failed and I need to service the brake booster , the brakes are very hard to press, I need longer stopping distances,and traction control and stability control towing harness my speed has been limited to 43 mph and it's saying that the mass air flow system is has low circuit

On March 14 2026 i was driving from [XXX] . To [XXX] to have my tires checked because i felt a strong vibration on my steering column and truck itself, it was getting worse so i took it to my mechanic who does my regular maintenance on truck. After inspecting Tire Goodyear Wrangler SR-A ( 275 55 R20) front passenger , mechanic informed me that the tire had separated from radial. And i need to get another tire right away, since there was non in stock we did the next best thing we took the front passenger tire the affected tire put it in the back and put the rear good tire up front. The next day i was on my way to purchase the replacement tire when the tire blew out. I was on a heavily traffic road [XXX] . I managed to take control of truck doing about 40 mph at the time and drove it off the road to a safer spot to look at damage. Well the passenger rear tire witch was originally on the front that had the separated radial blew a chunk out of the inner sidewall. I put on the spare and went and replaced the tire with another goodyear new tire. On march 28 as i was coming home from [XXX] Ca late at night the driver side rear tire blew as well again had to put on spare and next day took to local mechanics in [XXX] , and checked tire and again i was told that the tire separated from radial and that was the cause of blew out, they inspected all the tires at this point since this was the second tire from the same DOT set with less then 12000 miles that had separated. Well they found a

On March 14 2026 i was driving from [XXX] . To [XXX] to have my tires checked because i felt a strong vibration on my steering column and truck itself, it was getting worse so i took it to my mechanic who does my regular maintenance on truck. After inspecting tire ( [XXX] 55 R20) was called over and shown that my front passenger side tire had a flat spot, it looked deformed mechanic informed me that the tire had separated from radial. And i need to get another tire right away, since there was non in stock we did the next best thing we took the front passenger tire the affected tire put it in the back and put the rear good tire up front. The next day i was on my way to purchase the replacement tire when the tire blew out. I was on a heavily traffic road [XXX] . I managed to take control of truck doing about 40 mph at the time and drove it off the road to a safer spot to look at damage. Well the passenger rear tire witch was originally on the front that had the separated radial blew a chunk out of the inner sidewall. I put on the spare and went and replaced the tire with another goodyear new tire. On march 28 as i was coming home from [XXX] late at night the driver side rear tire blew as well again had to put on spare and next day took to local mechanics in [XXX] , and checked tire and again i was told that the tire separated from radial and that was the cause of blew out, they inspected all the tires at this point since this was the second tire from the same DOT set with less

On March 14 2026 i was driving from [XXX] . To [XXX] to have my tires checked because i felt a strong vibration on my steering column and truck itself, it was getting worse so i took it to my mechanic who does my regular maintenance on truck. After inspecting tire ( [XXX] 55 R20) was called over and shown that my front passenger side tire had a flat spot, it looked deformed mechanic informed me that the tire had separated from radial. And i need to get another tire right away, since there was non in stock we did the next best thing we took the front passenger tire the affected tire put it in the back and put the rear good tire up front. The next day i was on my way to purchase the replacement tire when the tire blew out. I was on a heavily traffic road [XXX] . I managed to take control of truck doing about 40 mph at the time and drove it off the road to a safer spot to look at damage. Well the passenger rear tire witch was originally on the front that had the separated radial blew a chunk out of the inner sidewall. I put on the spare and went and replaced the tire with another goodyear new tire. On march 28 as i was coming home from [XXX] late at night the driver side rear tire blew as well again had to put on spare and next day took to local mechanics in [XXX] , and checked tire and again i was told that the tire separated from radial and that was the cause of blew out, they inspected all the tires at this point since this was the second tire from the same DOT set with less

Engine ceased while driving and shutdown. Towed to dealership. Dealership ran diagnostic test and code P0016 came up. Its 6.2 engine has recall on other years with similar issues

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving approximately 65-70 MPH, the engine seized and made an abnormal sound, nearly causing a semi-truck to jackknife and crash into the vehicle. There was no warning light illuminated. The contact was left stranded in the west desert of Utah, where a wildfire had started, and the contact did not have phone service. Additionally, the vehicle stopped on a two-lane road with heavy semi-truck traffic, leaving the contact frightened and terrified for her safety. The contact jumped out of the vehicle. Migrants who were tending the sheep nearby assisted the contact in pushing the vehicle to the side of the road. The vehicle was towed to the dealer, where it was diagnosed with engine failure, and the dealer determined that the engine needed to be replaced. The vehicle was not repaired. The contact related the failure to NHTSA Action Number: EA25007 (ENGINE, ENGINE AND ENGINE COOLING). The manufacturer was notified of the failure, and the contact was misinformed that the model year was not included in the NHTSA investigation. The contact informed the manufacturer that she no longer felt safe driving the vehicle, regardless of the engine replacement, and the contact advised the manufacturer to guarantee that the failure would not recur after the engine replacement. The manufacturer then referred the contact to the NHTSA Hotline for assistance in investigating the safety issue. The vehicle was not repaired. The fa

The contact owns a 2019 GMC Sierra 1500 Denali. The contact stated that while driving at an undisclosed speed on a local roadway, the oil pressure warning light illuminated. The contact stated that oil was leaking from the vehicle. The vehicle was towed to the residence. The vehicle was then taken to the dealer, where it was diagnosed, and it was determined that the engine had seized. The manufacturer was not notified of the failure. The approximate failure mileage was 71,000.

While passing a vehicle the engine failed and had to replace the engine. The cams and lifters went out.

Driving and truck started to misfire (due to collapsed lifter after shop diagnosis) that then made my truck do reduced steering assist and my wheel got super hard to turn that almost sent me in the ditch at 60MPH and also turned off my Electronic Stability Control and also turned on my Service Parking Brake drove straight to the shop and parked it very lucky i did not crash and the fact that multiple people this has happend too GM need to recall from the 2019 and up for these lifters after reading about it.

While I was slowing down when approaching a red light, the engine abruptly shut off and had no warning or anything. Then once stopped the engine would no longer crank leaving me stranded in the middle of a busy roadway.

Shuddering, slipping, then lost all gears. Unable to put in reverse, drive, or low. Repair shop says the transmission needs replacement. Pump and torque converter issues. Vehicle has excellent maintenance and only 84k miles.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving approximately 45 MPH, the accelerator pedal was depressed; however, the vehicle lost automotive power and stalled. Several unknown warning lights were illuminated when the vehicle stalled. The contact was unable to restart the vehicle, and the vehicle was towed to the residence. The contact became aware that the 400 AMP fuse was blown. The contact replaced the fuse and replaced the starter, however during a test drive, the vehicle stalled. The vehicle was taken back to the residence, and a 400-AMP fuse was replaced a second time. The contact also replaced the starter, the alternator and replaced the ground cables, and during another test drive, the vehicle stalled. The vehicle was taken back to the residence and the contact determined that the engine had seized. The vehicle was not repaired. The manufacturer was informed of the failure. The contact researched online and related the failure to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the VIN was not included in the recall. The failure mileage was approximately 159,000.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving approximately 5 MPH, the rear wheels locked up. The check engine warning light was illuminated. The vehicle was taken to a local dealer, where it was diagnosed, and determined that the brakes needed to be replaced. The vehicle was repaired; however, the failure recurred intermittently. The vehicle was taken to another local dealer, Walker Bros Chevrolet (700 Erie St, Edinboro, PA 16412); for a second opinion, and the transmission and TCM were replaced. The vehicle was repaired; however, the failure reoccurred. Upon further investigation, the contact related the failure to the Customer Satisfaction Program: N192272400; however, the VIN was not included. The manufacturer was notified of the failure, and a case was filed. The failure mileage was approximately 40,000.

Lifter failure cylinder #8, this is a 2019 GMC Sierra Denali 4x4. It has a 6.2L engine. With 92823 miles on it. It would be nice if GM would do a recall on this year motor as well.

I have a 2019 GMC AT4 and it has stalled on the highway multiple times and smokes every time I started. I have read that the engine in it has been recalled on multiple other years but the one I purchased needs a $25,000 repair and it’s not safe to drive. There is not a current recall, but I’ve read that this engine on almost all the other trucks and SUVs that have it have had problems.

I had left work and pulled out of the parking lot to head towards the freeway. I had driven about 3 blocks and the truck made an indicator alert noise. My dash panel said reduced power mode or something to that effect. The truck felt as if it lost power. Luckily I was able to pull to the side of the road at which point I put it into park and shut it off. I waited a moment and then tried to restart it. The dash panel said something but it was too fast for me to read before it went away. The engine was cranking but it did not restart. I tried several more times before calling roadside assistance to have it towed to a nearby dealership. The dealership said that I would need to replace the engine $18,751.92. They said the Camshaft RPM are 0 while the crankshaft RPM is 2-300. Lifters and Rockers are not moving. The chain is most likely broke as well. The fuel pressure is about 30 psi in the high side. It would be just as expensive if not more to try and repair the existing engine if it is even repairable which they wouldn't know until they took it apart at which point I would have to pay for that as well even if it was not salvageable. They would need to replace the oil lines and cooler as well because debris from the engine could be in them and would do more damage if not replaced. I had already replaced the oil lines and cooler within the last 6 months. The truck has 114,000 miles. My warranty still had 3 months on it but the mileage stopped at 100,000 so I am out of luck. When

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving at approximately 70 MPH on the interstate, the vehicle experienced a sudden loss of engine power and decelerated rapidly, nearly causing an accident. The contact managed to pull off the road, but the failure persisted. Additionally, the contact reported a prior history of excessive oil consumption. During a previous visit to the dealer, the contact was advised to shorten the vehicle oil change intervals from 10,000 miles to 5,000 miles to mitigate the oil loss. The contact stated that the dealer failed to determine that the excessive oil consumption was an early symptom of the current engine failure. The vehicle was towed to a dealer, where it was diagnosed and determined that the belt filter and the piston needed to be replaced within the camshaft assembly. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 80,000.

The engine suddenly seized and now needs to be replaced. Regular oil changes, no leaks, and the engine just seized up and won't run. 5.3L V8.

While accelerating from a stop, the oil pressure warning illuminated. The driver immediately pulled over within approximately 0.15 miles and shut the engine off. Oil was actively leaking from the vehicle. The truck was towed and diagnosed with oil cooler line separation at the crimp fitting, resulting in rapid oil loss and catastrophic engine failure. Sudden oil loss while driving creates a safety hazard. This failure appears consistent with known issues involving oil cooler line assemblies on similar vehicles.