GMC Sierra Complaints (2019)

729 consumer complaints on file.

#11664474June 2, 2025
ENGINE, POWER TRAIN
I am reporting a serious mechanical and safety issue with my 2019 GMC Sierra 1500 (5.3L engine). The truck began misfiring, running rough, and would frequently “jump” and shut off while driving — creating an unsafe situation on the road. We attempted several repairs to resolve the issue: •Transmission flush •Replaced the intake manifold gasket •Replaced all eight fuel injectors •Inspected all ignition coils •Replaced faulty sensors The vehicle repeatedly showed a Cylinder 8 misfire, even after these repairs. Eventually, it was diagnosed that both the lifters and camshaft are bad, and the engine now needs a full replacement. This is extremely concerning because the truck has only about 47,000 miles on it. We brought it to the dealership in September 2024, while it was still under warranty, and told them it wasn’t running right. The dealership said there was nothing wrong. Now that the warranty has expired, GM is refusing to help with any repairs. This appears to be a manufacturing defect that was not properly diagnosed while under warranty. Engine failure at such low mileage, especially with early warning signs and repeated diagnostic errors, should be investigated as a serious reliability and safety concern.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11664234June 1, 2025
ENGINE
The engine lifters failed with out notice twice. Upon inspection of the vehicle it was determined that there was no issues that contributed to this failure. I paid to have the problem fixed within a year the same problem happend again. I was on the expressway and my car just shut off with out warning while cruising at expressway speeds and refused to cut back on for about 2 hrs.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11661793May 19, 2025
ELECTRICAL SYSTEM, SERVICE BRAKES, ENGINE
I purchased my vehicle in 2019. Since then, I have had several issues. I've had to replace the coolant reservoir, DEF heater/pump and twice changed the number 8 injector plug. The warning light came on just after the warranty went out. The code reader read the ambient sensor and no sensor.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11661618May 17, 2025
ENGINE, FUEL/PROPULSION SYSTEM, POWER TRAIN
Since I bought the truck, it has had transmission problems. The truck will violently jerk forward between Park - 1st - 2nd gears (up and down) pretty frequently. The dealership denied being able to recreate the issue and nothing was wrong. After dropping the vehicle off a few times, the dealer service dept said they recreated the problem and replace the torque converter. It did not work and the service dept manager told me that they knew about the problem the whole time but were instructed by General Motors to not attempt to fix the issue. I called GM Company and a supervisor eventually admitted to knowing of the transmission and engine issues all along but the GM engineers have not found a solution yet but they are working very hard to figure it out. Since those calls, my lemon law claim with BBB Auto was approved, but suddenly denied with no explanation. Following that, the #2 lifter failed and damaged the cam shaft. All were replaced and that was at 70,000 miles. The transmission has not been fixed.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11661365May 16, 2025
ENGINE
I was driving down the road no lights on the dash, when suddenly the dash lit up saying shift to park to restart. Ended up having to hurry and shift to neutral in order for the vehicle to not cause an wreck and coasted into parking lot. I tried to restart my truck and engine would not start. Had it towed to a dealership and lifters had ate through the cam shaft. Luckily I had an extended warranty and only had to pay a deductible for a new engine. They put a new engine in and I already have a rattle coming from it with less then 10,000 miles on it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11661445May 16, 2025
ENGINE AND ENGINE COOLING, ENGINE
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed and slowing down to stop, the vehicle suddenly shut off and failed to restart. The vehicle was eventually towed to the residence. The cause of the failure was not yet determined. The manufacturer was notified of the failure, but no assistance was offered. The local dealer was not yet contacted. The contact was informed of the NHTSA Action Number: PE25001 (ENGINE, ENGINE AND ENGINE COOLING). The contact stated that the vehicle had experienced the failure listed in the NHTSA Action Number. The failure mileage was 115,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11661484May 16, 2025
POWER TRAIN
I was headed out of town and stopped in the neighborhood at a stop sign. As usual, the Auto Stop/Auto Start feature turned the engine off and when I lifted my foot off the brake pedal to reengage the engine, the truck started rolling backward. The engine would not start even though all the gauges and systems were working as if the engine was on. I had the truck towed to my mechanic and after troubleshooting, they determined the engine was locked up and would need to be totally replaced. My truck has the 6.2L gas engine and have since learned that GMC is recalling later model trucks with this engine in them due to engine failure. If my engine failure had happened anywhere other than at a stop sign in a neighborhood, it could have caused a significant accident. I can't find a new engine because of the GMC recall and the cost to replace the engine with a lower mileage, used engine is approximately $16,500.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11661191May 15, 2025
SERVICE BRAKES, ELECTRICAL SYSTEM
Ok I know my vin don't go under the 10 recalls for 2019 gmc sierra limited 1500 rwd, but my truck has the same problem with the brake module has those recalls I feel like gmc might have used different parts for the other recall but used the same brake module for my truck cause I have that same problem has the recall. It's obviously a issue that needs to be look in and my brake module should be fixed by gmc
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11661258May 15, 2025
STEERING, SERVICE BRAKES
This is a second report of an issue that first happened in February 2025, the dealer replaced the battery and called it fixed. On Friday 5-2-2025 I started the vehicle and as I was driving the dash lit up with these warnings: Service Trailer brake system, Service ESC, Brake System Failure 62 mph top speed, Steering assist reduced drive with care, The vehicle steering got stiff and brake pedal went to the floor board with a little braking available if I stood very hard on the brake pedal. I got off to the side of the road, cycled the truck on and off and was able to drive off. It did this three times before I could get it to the dealer the next day, If my daughter was driving I would have expected that two of the three would have resulted in a wreck as she would not have been strong enough to steer or stop the vehicle. The dealer had it three days and replaced the brake master cylinder and called it fixed, I picked the vehicle up and on the way home I stopped for gas, after the gas station the dash displayed: Service brake assist, I turned right around and took it back to the dealer, they checked the code and said the brake assist module was drawing too much current, I picked the vehicle back up three days later, they said they bleed the air out of the brake system and called it fixed. No one wants to ride with me and my daughter is begging me to trade the truck, they call it a death trap waiting to happen. GM says it is all normal issues.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11661083May 14, 2025
ENGINE
My engine suffered a catastrophic failure, at 139468 miles. 2019 GMC Sierra Denali 1500. I had the engine replaced with a new engine date June 2024 GMC 6.2 engine failures is happening with more than just 21-24 models years.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660705May 13, 2025
ENGINE
I am writing to formally document an ongoing and serious issue with our 2019 GMC Sierra 1500 (VIN: [XXX] ), which I strongly believe may be related to the current GM recall involving L87 V8 engines—despite my vehicle not yet being included. Early last year, our family experienced a sudden and frightening loss of power while driving at full speed on a curve, with our children and their car seats secured in the back. The vehicle lost power abruptly, accompanied by a loud ticking noise from the engine. This incident could have easily led to a serious accident and was terrifying for all of us. Since that time, the truck has spent more than half the year in and out of repair shops. The initial repair estimate was nearly $20,000—unmanageable for us, especially since the vehicle is paid off. Fortunately, a family friend was able to repair it for significantly less, but the problems have persisted. Most recently, the check engine light returned and we experienced another episode of reduced power, suggesting an unresolved or recurring failure likely tied to internal engine components such as the long block, crankshaft, connecting rods, timing chain, or camshaft. This truck is essential for our family’s daily life—including commuting to work and school, and especially out-of-town travel. Our other vehicle, a 2007 Honda Accord, is much smaller and insufficient for our growing family. This ongoing issue has caused substantial disruption, stress, and financial strain. It has also delayed our ability to upgrade to a larger family vehicle, something we had planned and budgeted for before this ordeal. Given the severity and duration of the issue—and its apparent connection to the same engine problems affecting newer models—we want to ensure this situation is documented with the NHTSA and GM. We sincerely hope that the scope of the current recall will be expanded, and that appropriate relief or support will be offered to affected vehicle owners like us. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11659906May 9, 2025
ENGINE
I was driving on the highway at 60mph and the engine shut off. I was fortunate enough to be able to get the truck off the road without incident. The instruments instructed me to try to start the vehicle again. Upon doing so the engine made very loud and erratic knocking noises and I shut it off. I towed the truck to the GMC dealership where they told me the engine had thrown 2 rod bearings. They told me this was VERY common with the 6.2L engine. The truck was extremely well maintained with all services at the dealership, and only had 70,000 miles on it. GM quoted me $15,436.00 to replace the engine. I did open a case with GM when the incident occurred. Case # [XXX]
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11659178May 6, 2025
POWER TRAIN, ENGINE, STEERING
2019 GMC SIERRA 1500 AT4 2019 VIN: [XXX] On 10/31/2023 the transmission was replaced at Mileage: 72,875. The transmission at Jim Ellis Buick, GMC, after the truck would not drive over 40 miles in speeded. 12/23/23, 86788215, Engine Oil Cooler Hose had to be changed. Truck had to be towed from a public parking lot to the mechanic. The engine is burning oil, the warning messages say add oil, I have been adding oil once a month 1 quart. The steering wheel was locked and the truck had to be towed from a public parking lot to the mechanic. 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
#11659222May 6, 2025
ELECTRICAL SYSTEM, ENGINE, FUEL/PROPULSION SYSTEM
I’m contacting you regarding my 2019 GMC Sierra 1500 with the 5.3L V8 engine. The vehicle is currently experiencing a cylinder 8 misfire (code P0308), accompanied by engine backfiring, ticking noise, and exhaust fumes inside the cabin. Additionally, the ESC (Electronic Stability Control) warning light is on, and performance is noticeably affected. To date, I have: •Replaced all spark plugs and fuel injectors •Verified proper ignition coil function •Had an oil change on September 23, 2024, during which I reported early concerns about engine performance (shortly after the powertrain warranty expired) •Had a transmission flush on March 17, 2025, in an attempt to resolve continued drivability issues Despite these efforts, the issue persists. Given the known issues with AFM lifters and camshaft wear on this engine, I suspect a mechanical failure related to that system.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658968May 5, 2025
ENGINE
2019 GMC Sierra AT4 with 6.2L engine failed while driving 45 mph. No warnings and no check engine lights prior to engine failure. Coasted off the road, engine would not restart. Upon attempted restart the check engine light came on showing code P0016 for crankshaft/camshaft position sensor. Towed vehicle to dealership where engine replacement was required.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658622May 3, 2025
ENGINE, ELECTRICAL SYSTEM
Just purchased this vehicle, at 84000 miles had engine failure and electrical issues while traveling down interstate with my family. Lost power steering and all warning lights popped up. Safely exited busy interstate -- avoided major accident. This engine should have been included in the recent GMC recall - After a diagnostic $7000.00 plus to fix. UNSAFE ENGINE ISSUE!! Please help the consumer!!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658445May 2, 2025
SERVICE BRAKES
Ebcm software update errors
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658073May 1, 2025
ENGINE
I was driving my truck from lunch and out no where the truck stalled and did crank back had it towed to the dealership and said needed new engine because the timing had jump..
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658195May 1, 2025
ENGINE
During city driving my L87 engine losses power during acceleration. The start and stop feature makes loud scratching noises when it starts up.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658203May 1, 2025
ENGINE, POWER TRAIN
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the transmission unintentionally downshifted into first gear. The contact stated that several unknown warning lights were illuminated. The vehicle was towed to a dealer, and it was diagnosed and determined that the torque converter needed to be replaced. The vehicle was repaired; however, the failure persisted. The vehicle was towed back to the dealer, where it was diagnosed and determined that the engine needed to be replaced. The vehicle was repaired; however, the failure persisted. The manufacturer was notified of the failure. The failure mileage was approximately 86,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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