GMC Sierra Complaints (2019)

729 consumer complaints on file.

#11772324October 20, 2026
ENGINE, FUEL/PROPULSION SYSTEM, UNKNOWN OR OTHER
Recall N262576260 has just come out. My truck has the same symptoms/conditions consistent with the recall. I have a code P0420, check engine light, high oil consumption and loss of power. also, the GM representative i spoke with told me i have an open recall N242450631. it does not show on the NHTSA website and it does not show at the dealer. the high oil consumption has allowed the turbo to damage the catalytic converter and something in the engine to tap due to less lubrication.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772161October 19, 2026
ENGINE
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at 65 MPH, the vehicle experienced a slight loss of motive power, an abnormal sound emitted from the engine, and all warning lights illuminated. The contact pulled over to restart the vehicle; however, the vehicle failed to restart. The vehicle was towed to the contact's residence and was later towed to the dealer, where it was diagnosed, and the contact was informed that the engine failed and needed replacement. The manufacturer was notified of the failure. The failure mileage was 139,802.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11772281October 19, 2026
ENGINE
I was driving my truck (2019 GMC Sierra 5.3L) while pulling a travel trailer to go camping. As I was getting onto the interstate, without any prior warning, all at once the truck began to shake, make a concerning noise, and various warning lights began displaying on the driver information panel. I pulled the truck off as safely as possible and had the truck towed to a GM Dealer for service. After investigating the engine, the service department informed me that an exhaust lifter failed, camshaft lobe was damaged, and a cylinder wall was scored resulting in the engine having to be replaced. As this happened while on the interstate with many other passenger vehicles and semis around us, and with the added component of pulling a travel trailer in the moment, my family and myself were in danger of oncoming high speed traffic while getting the hindered truck off of the road, sitting waiting for a tow truck to come, having to unhook the trailer on the side of the interstate and re-hook it up to another truck, and transferring my wife, kids, and myself to another vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11771653October 16, 2026
ENGINE
VEHICLE STARTED RUNNING VERY ROUGH & DISPLAYING ERROR CODES FOR "STEERING ASSIST IS REDUCED", "SERVICE PARKING BRAKE", AND "SERVICE ESC". WHILE DRIVING VEHICLE IT WOULD ACCELERATE & DECCELRATE ON ITS OWN. LIMPED THE TRUCK TO OUR LOCAL REPUTABLE MECHANIC WHO RAN TESTS & DETERMINED IT AS AN ISSUE WITH THE LIFTERS. IT IS KNOWN GM IS CURRENTLY HAVING ISSUES WITH THE 6.2L V8 ENGINES. CLEARLY THIS ISSUE IS WIDER SPREAD THAN THE CURRENT FEW YEARS THEY ARE ADMITTING TO. WE ARE HAVING TO HAVE A NEW ENGINE INSTALLED AT OUR EXPENSE.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11771745October 16, 2026
POWER TRAIN
Engine died while on the freeway. Had the truck sent to my dealer via flatbed with AAA. They diagnosed it as the known lifter issue—lifter broke and metal went into the camshaft and scored it. So I need to replace the camshaft and lifters. They’re quoting me $12k for that. I have 83000 miles on this car and I take very good care of it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11770483October 11, 2026
ENGINE
The engine started making a loud knocking noise and lost power. Luckily the event happened in a neighborhood and no one got hurt. The check engine has been on for brief periods prior to this event.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11770075October 9, 2026
ENGINE
The engine developed a noise while driving. The engine has been replaced. So inspection of the original engine is not available. The failure happen on the interstate system in a large metropolitan city, in heavy traffic. Our independent service center confirmed that one cylinder was not working. We had messages about brakes needing service, the ECS needed servicing. check engine light was flashing. These items came on about 5 minutes before we pulled off the interstate system.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769968October 8, 2026
FUEL SYSTEM, GASOLINE
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving 25 MPH, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The contact stated that later while attempting to start the vehicle, the vehicle failed to start. The contact's son later attempted to start the vehicle, and the vehicle started. The vehicle was taken to the dealer, but the diagnostic report was incomplete. The contact referenced an unknown recall; however, the VIN was not associated with a recall associated with the failure. The manufacturer was contacted and made aware of the failure. The failure mileage was approximately 50,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11769031October 5, 2026
ENGINE AND ENGINE COOLING, POWER TRAIN
The contact owns a 2019 GMC Sierra 1500. While driving 65 MPH with cruise control activated, the messages "Service ESC", "Service Park Brake", and an unknown message was displayed, causing the cruise control to deactivate. The check engine and transmission warning lights illuminated. The vehicle was jerking and the transmission was lagging while driving. The vehicle was taken to the dealer, who determined that the camshaft and lifter needed to be replaced. The manufacturer was notified of the failure by phone and advised the contact to file a complaint with the NHTSA Hotline. The failure mileage was approximately 120,500.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11768513October 2, 2026
POWER TRAIN
Engine failure. My engine is near failure, loud knocking, check engine light and trusted repair shop analyzed. The repair diagnosis is that the engine will fail in the very near future and that is not safe to drive because of risk of failure. I like the truck and it is still in great condition (129k miles). So, I search for recall information and see the 6.2L 2021-2024 recall and see there is additional investigation underway on newer models. Is it possible it goes back to the redesign of the pick-up in 2019? It sounds like the same issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11768360October 1, 2026
POWER TRAIN
Truck has GMC 6.2L engine at 66,000 miles, lower end of engine failed. GMC refused to handle complete engine replacement. Final bill was $9858.66, GM covered $1400.00. Local GM dealer truck was purchased from refused to assist in any way. Dealer refused to give detailed diagnostic of what caused engine failure or the repairing tech's repair notes
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11767846September 29, 2026
ENGINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11767365September 28, 2026
ENGINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11766351September 23, 2026
ENGINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11766268September 22, 2026
ENGINE, 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11766108September 22, 2026
ENGINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11766114September 22, 2026
ENGINE
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)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11765840September 21, 2026
ENGINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11765694September 20, 2026
AIR BAGS, ELECTRICAL SYSTEM, UNKNOWN OR OTHER
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.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11764998September 17, 2026
ENGINE
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
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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