GMC Sierra Complaints (2019)

729 consumer complaints on file.

#11699412November 14, 2025
SERVICE BRAKES
While driving in my uncongested neighborhood, my brakes totally failed. Dash indicated multiple brake failure warnings. I managed to get my truck stopped and returned home by engaging my low range, four wheel drive. If I had been in on the open road, going down a hill, negotiating a curve, or in traffic a crash would have ocurred, potentially fatality. My vehicle was towed to a GMC dealership. They diagnosed the problem in the electronic braking module with a software update needed. My vehicle Is a 2019, but had only 23,283 miles at the time of the braking failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699478November 14, 2025
ENGINE
2019 GMC Sierra that was not on recall list for engine, had same exact issue as the recalled engines. We were driving, light came on and it wouldnt work properly. We immediately took it for diagnoses and it was same reason as the recalls, however our engine wasnt on the list. We just had to pay 14K cash for our truck engine and repair. We purchased 5/24 with 78K miles and it stopped at 94K miles. We didnt have the truck for 5 months because of the motor recalls were backed up. GMC refusing to reimburse us even tho there is still issues with that motor
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11699362November 14, 2025
ENGINE
The starter started dragging about a year ago and on November 12 the 2019 GMC truck would not start. We had it towed to Harper GMC in Minden, La. They told us the motor was locked up. This vehicle has a little over 40,000 miles on it. Has always been parked in a carport out of the weather and still looks brand new. I see where 2021 GMC trucks have a recall on the motor and this is the same problem with our 2019.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698930November 12, 2025
ENGINE
Truck cut out going across the road almost got hit due to the vehicle stalling then about a mile down the road the check engine light came on parked it took it to my mechanic and after the incident it was throwing a cylinder misfire code. Cylinder one when the mechanic got in there was completely shot and I had to have a new motor. No warning no lights could have potentially caused a major accident.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698989November 12, 2025
ENGINE, ENGINE AND ENGINE COOLING, ELECTRICAL SYSTEM
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at 25 MPH and making a turn, the vehicle lost motive power. There were several unknown warning lights illuminated after the failure. Upon investigation, the failure was related to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling). The vehicle was towed to an independent mechanic, where it was diagnosed with lifter failure and camshaft damage. The vehicle was repaired. The local dealer was not contacted. The manufacturer was contacted and opened a case, and referred the contact to the local dealer for assistance. The failure mileage was approximately 86,960.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698576November 10, 2025
POWER TRAIN
Transmission problem I have had 3 transmission replacement. I was told that these trucks have a faulty transmission from the sales representative to the mechanics. After these transmission replacement now I have an engine problem where the lifters need to be replaced and camshaft. I have had all service done on time never missed a service. Now the dealership is telling me that this could be a reason why my transmission keeps going out. And can’t really give me a reason why I keep having the same problem. Truck has 97k miles on it when I purchased it had 45k I can’t even enjoy the vehicle because it’s always at the dealership with the same problem and they don’t know why it’s keeps happening, at this point it is a safety concern for me this is my daily driver where I drive my kids to school now I never know when it will just stop running. It jerks I’m afraid when I’m stop at a stop sign I might hit the car I front of me.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698647November 10, 2025
ENGINE
Engine problems (Oil, crankshaft, loss of propulsion) similar to that of recalls in 2021-2024 models.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698136November 7, 2025
POWER TRAIN
The original engine (6.2L L87) had to be rebuilt by GM because of lower engine knocking in June 2024, with 57,873 miles. The rebuilt engine had to be replaced with a remanufactured engine in October 2024, but had to wait until the completed work in December 2024. The remanufactured engine started knocking, and that engine was replaced in October 2025. All part of the L87 6.2L engine failures. Problem documented by dealerships. Components were brought to GM's attention. No warning lights or messages - just lower engine knock.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11698140November 7, 2025
ENGINE
It is the same issue with 2021-2024 6.2L engines that have already been recalled. I have to replace lifters and cam because of the issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697439November 4, 2025
ENGINE
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, several unknown warning lights illuminated, and the engine seized. The vehicle was taken to an independent mechanic, where it was diagnosed with a misfire in cylinder #3 and engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The contact referenced an unknown recall with a similar failure; however, the VIN was not associated. The manufacturer was not made aware of the failure. The failure mileage was approximately 101,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697320November 4, 2025
ENGINE
Driving at night when the low oil light came on then engine failed. Engine is now blown and will not run. Engine L87.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697176November 3, 2025
POWER TRAIN
Transmission experiences shuddering while accelerating. Impact on driving performance which is a safety issue. Problem has been confirmed by the dealer. No warning lights are present during this problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697185November 3, 2025
ENGINE
My truck had a ticking, knocking on the bottom end of the engine as I was driving home with my children. When i pulled into my driveway, the low oil pressure light came on and the truck began to stall while the back of the truck was till in the roadway. Several cars had to come to a complete stop to avoid hitting us, right where my children were seated in the back. I was able to limp the truck into my driveway. The following day I attempted to start the truck. It started hard and immediately gave me a low oil pressure light. I shut the truck off and called the dealership. The dealer wanted $3000 to just diagnose the problem. I had to pay out of pocket to get the truck towed to a private shop. The private shop started the truck and attempted to drive it to reproduce the issue. The truck engine seized and I had to pay to have it towed back to the shop. I then had to purchase a brand new crate engine from GM and pay to have it installed. The seized engine would not even roll over, so the cost of labor was increased due to them not being able to unbolt the torque converter on the engine. My engine is a 6.2l and GM told me based on by truck being a 2019, that it was not included in the recall. So far, the engine replacement has cost me $19,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11697071November 2, 2025
ENGINE
Was driving at about 55 mph and vehicle popped up with warning and said shift into neutral to restart. I tried to and all power turned off. This was at around 8 p.m. so no headlights or anything. Luckily got it stopped without hitting anything. Had vehicle towed and motor was locked up. Spun bearing they said. Same issue apparently as other 6.2 liter engines have been having.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11696920November 1, 2025
ENGINE
Engine Failure. 1. The lifter in cylinder 5 failed (dropped) this prompted me to bring the truck in initially. 2. Upon further inspection all the cam bearings were scored and out of spec. Waited 4 months for an engine replacement from GM. Eventually I cut my losses and sent the block to a machine shop. This was all paid out of pocket. Truck had 74,000 miles on it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11696941November 1, 2025
ENGINE
Engine suddenly lost power at highway speed. Truck was still running so I was able to get off the highway. Engine failure was caused by bent lifter. Lifter failure also caused damage to the camshaft. Vehicle was at dealership for significant time with a large repair bill that GM is not willing to cover due to the vehicle being 5 weeks out of warranty
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11696942November 1, 2025
ENGINE
I keep getting low oil warning even after oil change
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11696958November 1, 2025
STEERING
Without any notice, I lost my power steering while driving. The wheel jerked to the side, and when I corrected I realized that I no longer had power steering. I was still able to "steer" my vehicle, but not without brute force. If it were someone of lesser ability (e.g. elderly) it may have led to a devastating outcome. I have yet to get the issue diagnosed, as it just happened yesterday, but it certainly is concerning! I just wanted to bring this to the attention of the NHTSA, as I've since learned that I'm not the first GM Sierra owner to suffer this malfunction.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11696751October 31, 2025
POWER TRAIN
The engine started making ticking sounds, then the check engine light came on on and it began running very rough. GMC dealer replaced camshaft, all 16 lifters and guides and one bent push rod. The repair (not including transportation - I had to leave in GallupNM when I was enroute to Minnesota) cost was $7,832.81. The vehicle has 93,000 miles
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11696859October 31, 2025
ENGINE
Sudden lost of power while driving. I was driving on the i95 and out of nowhere the vehicle shut off in the middle of the highway. It was a scary moment because I could of been in serious accident. All the engine signs were displayed on the dashboard.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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