2019 GMC Sierra 1500

647 complaints on file, page 1 of 33.

1. Filed Sep 29, 2026Failure Jul 1, 2026164,687 milesNew Orleans, LAEngine

   The contact owns a 2019 GMC Sierra 1500. The contact stated that the engine failed to start after several attempts. The vehicle was towed to an independent mechanic where a diagnostic test was performed and the mechanic discovered metal shaving inside the engine oil pan. The vehicle was diagnosed with engine failure. The vehicle was repaired. The failure mileage was approximately 164,687.

   NHTSA complaint 11767846
2. Filed Sep 28, 2026Failure Aug 14, 2026142,370 milesOak Grove, MOEngine

   The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving 55 MPH, the vehicle experienced engine failure. The vehicle was towed to the local dealer, where it was diagnosed with total engine failure. The dealer informed the contact that the VIN was not under recall. The failure mileage was approximately 142,370.

   NHTSA complaint 11767365
3. Filed Sep 23, 2026Failure Jul 15, 2026Clinton, IAEngine

   6.2 liter engine failure @ just over 100,000 miles. Prior to 100k miles I had taken to the dealership for sporadic loss of oil. They confirmed that the oil had been upgraded previously as instructed by GM so must be another source of the leak. Engine locked up while driving down the road. Had to have the vehicle towed and the mechanical said the motor is shot, and related to lower camshaft bearing issue. The only warning signs were the low oil light which happened around the mid 90k miles, so I would monitor that. When the engine failed there was no low oil light on, it just started shaking/vibrating and then kicked out. I think hte mileage read right around 103,000 approx. when it died.

   NHTSA complaint 11766351
4. Filed Sep 22, 2026Failure Dec 8, 2025Jefferson City, MOEngine, Fuel/propulsion system

   Often blows blue smoke and oil out exhaust, and uses more engine oil that would ever be expected, especially when pulling a load. I took it to Rusty Drewing GMC dealership IN Jefferson City, Missouri, and they told me everything was fine, that they could not find a problem.

   NHTSA complaint 11766268
5. Filed Sep 22, 2026Failure Sep 21, 2026Muskegon, MIEngine

   2019 GMC Sierra Denali 6.2L , Back in march 2026 my motor seized up , waited for a month for a new motor replacement that I had to pay out of pocket for 12k+, Finallyy got my truck back mid may! , fast forward to [XXX], Lifters and cam went out had to get replaced, I only driven under 5k miles since the motor replacement (The motor I payed for came with a 3 year warranty) , Also over a months waiting… [XXX], I receive a call from the dealership saying my truck was ready for pick up but during the test drive , it started having a bottom end problem, Turns out it was a bearing issue! , Now they have to replace the motor again! Michigan! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

   NHTSA complaint 11766114
6. Filed Sep 22, 2026Failure Mar 26, 202688,000 milesRochester, NYEngine

   The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at speeds above 60 MPH, the vehicle lost power and decelerated to approximately 10 MPH, with a knocking sound coming from the engine. The vehicle was driven off the highway and taken to the local dealer to be diagnosed. The contact was informed that the engine had experienced internal damage to the #4 lifter and a bent #4 pushrod and damaged the #4 engine camshaft lobe. The contact was informed that the engine needed to be replaced. The vehicle was not yet repaired. The contact stated that the dealer was previously informed of a ticking sound coming from the engine. The manufacturer was notified of the failure. The failure mileage was 88,000.

   NHTSA complaint 11766108
7. Filed Sep 21, 2026Failure Aug 31, 2026113,000 milesEdmond, OKEngine

   The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving 35 MPH, the vehicle lost automotive power. There was no warning light illuminated. The contact attempted to restart the vehicle, and the check engine warning light illuminated. The vehicle was towed to an independent mechanic to be diagnosed, and DTC: P0016 was retrieved. The contact was informed that the engine needed to be replaced due to catastrophic engine failure. The manufacturer was notified of the failure. The failure mileage was 113,000.

   NHTSA complaint 11765840
8. Filed Sep 20, 2026Failure Feb 17, 2023Longview, WAAir bags, Electrical system, Unknown or otherCrash1 injured

   The vehicle has experienced repeated Electronic Stability Control (ESC) malfunction warnings that appear related to a prior GM recall for ESC malfunction codes. These warnings occurred before and after dealer repairs. The ESC malfunction may have affected other safety systems. I was involved in two separate accidents while driving this vehicle, and in both incidents the airbags did not deploy. In one accident, the vehicle struck multiple objects in a frontal collision at significant speed. The airbags did not deploy at all. I lost consciousness, sustained injuries, and have experienced ongoing physical symptoms since the incident. The ESC malfunction warnings continued even after GM dealership repairs following each accident. The defects were not resolved, and the vehicle has remained unsafe and inoperable. The vehicle has been inspected by a GM dealership multiple times, but the issues were not corrected. The ESC malfunction warnings and airbag non‑deployment have been reproduced and confirmed through these service visits. There were warning messages related to ESC malfunction prior to the failures, and these messages continued to appear. The combination of ESC malfunction, loss of control, and airbag non‑deployment suggests a possible cross‑module safety failure involving the airbag system and ESC. I have contacted GM’s corporate safety team and GM’s executive support, but the responses I received did not address the safety‑defect issues. I have sent follow‑up emails and made phone calls but have not received further assistance. The vehicle remains unsafe to operate, inoperable, and available for inspection.

   NHTSA complaint 11765694
9. Filed Sep 17, 2026Failure Aug 3, 2026Charlotte, NCEngine

   Driving vehicle at normal speeds and engine suddenly shut of and stopped in the road. would not restart. Had to get it towed to dealer who diagnosed problem as a seized up engine and need a new engine replacement

   NHTSA complaint 11764998
10. Filed Sep 16, 2026Failure Aug 9, 2026159,000 milesMonument, COEngine and engine cooling

    The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle came to a full stop to allow wildlife to cross the road. Upon accelerating, the engine made an abnormal banging noise. The contact stopped to inspect the vehicle and observed an engine misfire while idling. The vehicle was towed to the residence, where an independent mechanic diagnosed that the lifters had collapsed, and that the engine needed to be disassembled for further diagnostic testing. The failure mileage was approximately 159,000.

    NHTSA complaint 11764783
11. Filed Sep 14, 2026Failure Sep 1, 2025Kapaa, HISeat belts

    The backseat middle passenger seatbelt failed to release causing my [XXX] child to become stuck and restrained in the seatbelt blocking his circulation, therefore for the safety of my child I had no choice but to cut the seatbelt. I have tried to report it to the dealership and insurance company but both advised that this is not something that is covered by insurance or warranty. Is this a recall that the manufactory can repair? INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

    NHTSA complaint 11764211
12. Filed Sep 11, 2026Failure Apr 14, 2026Grove City, OHEngine

    Since I purchased my vehicle in 2021, I continued to have issues with my oil pressure light coming on usually about 2000 - 3000 miles past the oil change. When checking oil, I would find that it was low 2 quarts of oil each time. I reported this to the GM Dealer and they did oil consumption tests and determined the oil loss was within GM tolerances. So apparently it is ok to burn a quart of oil every 1000 - 1500 miles. Then fast forward to January 2025, apparently my rear main seal was blown out. Unfortunately by then my Powertrain warranty had expired. So that cost $3,794. Now fast forward to March 2026, I hear a noise in my engine and notice it is leaking oil again. Upon taking it back to the dealer, they tell me the engine needs replaced or rebuilt. The rear main seal is bad again, a lifter bad and they specifically say "The engine still has excessive blowby due to stuck piston rings or a scored cylinder". This is the first time it was ever reported to me that the engine as blowby. Regardless of all this, I had to replace this engine with less than 117,000 miles on it. I was reporting the oil issue when it was well under the powertrain warranty, but the first Oil Consumption test was done at 51,946. So again under powertrain warranty. However I continued to tell them about it until these issues occurred. Now I have $10,912.75 invested in repairing/replacing an engine. I pushed it to GMC Customer service and they didn't want to help. However when investigating this issue with other mechanics, they all seem to know about all the issues these L87 engines have. Then I found out that 2021 - 2024 L87 engines were recalled, but my 2019 was not. It appears my engine has similar issues as the recall. I was just lucky enough that nothing happened while I was driving. So I asked that if a recall occurs that GMC should be responsible for refunding all of this money as they should have taken care of it when I told them 100,000 miles ago.

    NHTSA complaint 11763704
13. Filed Sep 10, 2026Failure Sep 2, 2026Littleton, COEngine

    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. The engine seized up while driving in traffic which has a safety impact on the occupants and other drivers. The vehicle was towed to GM and the they noted the the engine has catastrophic internal failure with large metal debris in the engine oil and filter. This is consistent with failures that other GM owners have experienced with GM's L87 engine. The initial recall (Recall 25V-274) for a specific manufacturing window (March 1, 2021, to May 31, 2024), the NHTSA launched EA25007 because it continued to receive a flood of complaints from owners whose vehicles fell outside that original recall window. That is me, I am outside that original window. But I am confident that the issue was known by GM and should have been handled several years ago with a wider recall window. Now I was exposed to a safety issue and I am stuck with a large repair bill. I think there is an even broader active investigation EA26005.

    NHTSA complaint 11763284
14. Filed Sep 8, 2026Failure Sep 1, 2026Moline, ILPower train

    I HAD COMPLAINED TO THE DEALER LESS THAN ONE YEAR AFTER PURCHASE IN MAY OF 2019 THAT THERE WAS A SHUDDERING NOISE AND THE TRANSMISSION HESITATES AND SEEMS TO LOCK UP AT TIMES. I WAS TOLD IT WAS "JUST HOW THE 8-SPEED TRANSMISSION OPERATES". IT HAS CONTNUED THROUGHOUT OWNERSHIP AND NOW SEEMS TO LOSE POWER AND VIBRATES EXCESSIVELY DURING ACCELERATION.

    NHTSA complaint 11762906
15. Filed Sep 2, 2026Failure Jan 3, 2025Tucson, AZEngine

    I was coming to a stop at a stop a 3 way stop intersection. I parked completely and when I stopped the vehicle just shut down I did not have any warning signs come on prior as I looked at the dash it said place vehicle into park and start. I tried that but truck did not start. Call my friends we towed the truck on a trailer to my house and set up an appointment with gmc here in Tucson az

    NHTSA complaint 11761482
16. Filed Sep 1, 2026Failure May 23, 2026Anderson, INEngine

    My truck is a 2019 6.2 motor GMC it fell outside of the motor recall. On May 23, 2026, I had a catastrophic engine failure. GM would not cover any costs associated with the engine replacement. I have a photo of the failed lifter. This issue is a problem with GM and its active fuel management system. GM knew about the issue and put the engine into service.

    NHTSA complaint 11761311
17. Filed Sep 1, 2026Failure Jun 30, 2026Moorhead, MSEngine and engine cooling

    See attached document for complaint.

    NHTSA complaint 11761267
18. Filed Aug 31, 2026Failure Jul 31, 2026Tuscumbia, ALEngine, Power train

    Engine went out very devastating $10k out of pocket

    NHTSA complaint 11761078
19. Filed Aug 30, 2026Failure Jun 3, 2026Blue Springs, MOEngine

    My 2019 6.2 engine suffered from severe loss of compression caused by internal piston ring failure and bore scoring also loss of power . In the 6.2L engine , piston ring failure and ring- seal are direct consequences of connectiing rod alignment errors, My engine failure is proof that this is the same situation that is currently under investigation and have proof with compression test and report done by my Technician . First time it happened to me it just stopped on me in the middle not the road all lights came on the dash including ESC light something it never done before. But before this happened it had been running rough. I took it first to the local repair shop and they wouldn't be able to work on it , So I took it to the local dealer and there it got. worse from there . Took it to the dealer changed the battery and it was running again but they found it had really bad leak on the rear main seal spent over $3,000 for all of it. Thought the problem was over after that months later after it was running rough again took back to the dealer and from there they told me there were oil coming through the piston rings and metal shaving in the engine and from there found out engine needed to be replaced Warranty company would not cover it. I had to pay 1500.00 for rental car coverage, teardown of engine was 3,500 since the extended warranty did not cover it Endurance Warranty Co. denied my claim.Dealership is charging me out of pocket charges of 13,495 for the engine replacement plus engine teardown Endurance Warranty Co. denied my claim. Even after paying for warranty for almost 2 Years. GM says manufacture warranty is out of coverage can not be apart of the recall but engine failure mirrors 21-24 recall 6.2 engines.

    NHTSA complaint 11760820
20. Filed Aug 30, 2026Failure Oct 27, 2025Vienna, MEEngine

    2019 GMC Sierra 1500 Denali Ultimate (6.2L L87 V8 Engine)Description of Safety Defect & Incident Chronology: XXX (49,801 miles): While idling in my driveway, the engine began ticking loudly, running roughly, and ultimately stalled. The vehicle was towed to Hight Chevrolet in [XXX]. The dealership stated they test-drove the vehicle twice while monitoring live data, could not duplicate the noise, and released the truck back to me.XXX (57,920 miles): The engine began ticking loudly again. I returned the vehicle to the dealership. Upon inspection, technicians found metal debris in both the oil filter and the oil pan. The dealership diagnosed a catastrophic bottom-end engine failure.Resolution: The original engine was replaced with a GM remanufactured crate engine, covered under the GM factory warranty.Safety Concern:Although my vehicle is a 2019 model, it suffered the exact same catastrophic bottom-end bearing failure currently being investigated by NHTSA for 2021–2026 GM 6.2L L87 engines. This defect poses an imminent safety hazard, as a sudden bottom-end failure can cause the engine to seize without warning, resulting in a complete loss of motive power and propulsion at highway speeds, drastically increasing the risk of a crash. Furthermore, despite GM's claims regarding limited production windows, this case proves the defect is present in earlier 2019 model years. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

    NHTSA complaint 11760697