GMC Sierra Complaints (2019)

729 consumer complaints on file.

#11716003February 5, 2026
ENGINE
Catastrophic engine failure. Engine failed while driving and lost all oil pressure. Nearly cause accident
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715720February 4, 2026
ENGINE
While pulling a small trailer to go hunting, the engine just lost all power while merging onto the freeway. I had to pull over to the shoulder in high speed traffic because the truck had no power and had an odd clanking sound. When I took it to the dealer for repair, they stated that the lifter failed and also damaged the cam. This required a full engine rebuild. When the dealer went to test drive the truck with the new parts, ANOTHER lifter failed and also affected the cam again which required another rebuild.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713601January 27, 2026
FUEL/PROPULSION SYSTEM, POWER TRAIN, UNKNOWN OR OTHER
This vehicle shudders and vibrates during shifting and acceleration at different speeds. Transmission shifts out of gear quite often leaving me stranded at times trying to make it safely out of traffic.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713634January 27, 2026
ENGINE
On January 15, 2026, my wife was driving our 2019 GMC 1500 Sierra Denali and the lights on the dash came on with the truck losing power. I made to my wife later in the day and was able to drive the truck to the dealership only achieving 15mph for about 5 miles. The Mike Bell Chevrolet Dealership in Carrolton GA stated that my engine was knocking and needed to be replaced. I took my truck the John Thornton Buick GMC dealership on January 22 to get a second opinion and they stated the exact same thing stating the engine needs to be replaced. The dealership is stating the remanufactured replacement issue is over $10,900. My truck has over 271,000 miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11712861January 23, 2026
ENGINE, FUEL/PROPULSION SYSTEM
My vehicle recently experienced a sudden flashing check engine light, severe misfiring, and rough engine operation, creating an unsafe driving condition. An inspection by an authorized GMC dealership, Serra Buick GMC Champaign, confirmed a failed deactivating valve lifter on Cylinder 5, documenting that the lifter ceased movement after a single engine rotation. The dealership advised that the failure necessitates replacement of all lifters and extensive internal engine components, at an estimated cost of $5,650.75. This defect is not isolated, unforeseeable, or the result of consumer misuse. It is directly associated with General Motors’ Active Fuel Management (AFM) system, which has been widely reported to cause: •Premature lifter collapse •Camshaft damage •Severe engine misfires •Loss of power while driving •Catastrophic engine failure
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11712899January 23, 2026
SERVICE BRAKES, ENGINE
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at various speeds, the braking system had erroneously activated, causing the vehicle to abruptly stop in the middle of the road. The vehicle was towed to the local dealer, who diagnosed that the failure was caused by an engine malfunction of the number six cylinder. The vehicle was repaired. No further information was available. After retrieving the vehicle, the contact was driving approximately 10 MPH when the failure reoccurred and the braking system erroneously activated, causing the vehicle to abruptly stop. During the incident, the driver's head slammed into the steering wheel, causing a head laceration. No medical treatment was required. The vehicle was towed back to the dealer. The cause of the failure was not yet determined. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 120,000.
Crash:
No
Fire:
No
Injuries:
1
Deaths:
0
#11712601January 22, 2026
UNKNOWN OR OTHER
IntelliBeam will sometimes allow me to activate the system but will turn itself off and not allow it to be reactivated until the power is cycled. Other times it will not activate at all. This is on a dark backroad with no traffic.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11712114January 20, 2026
ENGINE
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at various speeds, there was an abnormally loud clamoring sound coming from the engine. There was no warning light illuminated. The vehicle was taken to a dealer, and the mechanic informed the contact that the engine might fail soon. The contact was able to continue driving the vehicle, but the contact was advised to bring the vehicle back if the failure worsened. The following day, the contact stated that the front of the vehicle started shaking with several unknown warning lights illuminated on the instrument panel. The vehicle was taken back to the dealer and remained with the dealer undiagnosed. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 71,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11712140January 20, 2026
POWER TRAIN
While driving in traffic in March 2025, the vehicle experienced a sudden and complete engine failure, creating an unsafe condition. Subsequent diagnosis confirmed failure of the camshaft and lifters, requiring full engine replacement. General Motors declined to cover this repair. However, this failure is consistent with widely reported camshaft and lifter issues affecting other GMC and GM vehicles equipped with the same 6.2L engine platform. Due to the unavailability of replacement engines through GM, I was forced to wait several months for an engine sourced through Jasper Engines. During this time, the vehicle was inoperable, resulting in over $10,000 in out-of-pocket expenses, including extended rental vehicle costs. The engine replacement was completed by Camden Automotive and Diesel in Camden, South Carolina, who maintain all service and maintenance records related to this repair.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11712150January 20, 2026
ENGINE
Vehicle is having loss of oil issues.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11712175January 20, 2026
POWER TRAIN
Catastrophic engine failure of known defective L87 engine
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11711864January 19, 2026
ENGINE
I have the L87- 6.2 V8 and my crankshaft bearings burned up at highway speeds and the truck shut down. The is a massive recall on this engine for this reason but does not include the 2019 model and it most definitely should. The issue started in 2019 (not 2021).
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11711928January 19, 2026
ENGINE
ENGINE COOLER LINE DETACHED FROM CRIMP CAUSING ENGINE TO DRAIN OIL RAPIDLY AND ENGINE SEIZED. THE OIL PRESSURE WARNING LIGHT CAME ON, AND THE TRUCK WAS IMMEDIATELY SHUT DOWN (WITHIN 10 SECONDS). WE WERE PUT AT RISK BECAUSE WE TRIED TO COAST OUT OF TRAFFIC AND PARK IT ON A SHOULDER TO PREVENT BEING STRUCK BY ONCOMING TRAFFIC. TRUCK WAS TOWED TO DEALER WHERE WE WERE TOLD THE ENGINE WAS SEIZED AND WE WOULD HAVE TO PAY FOR A NEW ENGINE. DIGGING INTO THIS FURTHER, GM HAD PUT A SERVICE BULLETIN FOR THIS EXACT ISSUE OUT ON THIS YEAR OF TRUCK. (N212326940-01). I BROUGHT THIS UP TO THE DEALER AND THEY TOLD ME THAT MY SPECIFIC TRUCK WASN'T INCLUDED IN THE RECALL AND WOULDN'T BE COVERED.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11711946January 19, 2026
ENGINE
Engine started knocking so took to the GMC dealer they said the engine needs to be replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11711705January 18, 2026
ENGINE
Manifold. I use my truck daily for my job. I was coming home every night, tired with headaches not knowing why I was being poisoned. The manifold was leaking in the cab of the vehicle. This is a major safety issue when it’s poisoning people.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11711648January 17, 2026
ENGINE
6.2L engine lifters were replaced in 05/24. Complete engine failure in 09/25. Engine replaced with remanufactured engine. Fuel pump fail while driving on highway. Engine shutoff completely while driving 70mph. Prior to shut off engine struggled going over a bridge on I95 at 70 mph. Fuel pump failure happened 11/25 after ~900 miles on new engine. All service, maintenance and repairs completed by GMC dealership.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11711603January 17, 2026
ENGINE
I have a 6.2 engine that failed just recently had to get it rebuilt after hearing all the recalls for the other 612’s also have a 2023 GMC Denali Yukon also what does 6.2 on the recall
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11710862January 14, 2026
ENGINE, POWER TRAIN
With 115000 miles on it, I felt a clunk when it went in to gear. I took it to the dealer 3 times to have the mechanic drive it. He said it sounded and felt right. The the transmission blew and I had to have it replaced to the tune of 4800 dollars. 2 weeks after that the engine blew and I had to have that replaces for 17000 dollars. I really like my pickup but this seems a bit excessive. The 5.3 engine isn't good for that year
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11710942January 14, 2026
ENGINE, POWER TRAIN
I am an owner of the same year, and model GMC Sierra 1500 included in the GM Customer Satisfaction Program N212326940, which is the oil cooler line failure. However, my VIN was not included in the program despite experiencing the exact same failure the program covers. My safety and the safety of others is put at risk because the failure may cause an immediate loss of oil pressure or propulsion while driving. This is a huge safety hazard, since loss of vehicle control may occur. My vehicle has been inspected by a certified GM dealer and they confirmed the oil cooler line has failed and must be replaced. I have not experienced any warning lights, but my vehicle is leaking an excessive amount of oil. The vehicle is no longer safe to drive until repaired.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11710239January 11, 2026
ENGINE
While driving vehicle at highway speeds the vehicle shut down without any warning
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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