2019 GMC Sierra engine problems
337 of the 673 complaints owners filed with NHTSA about the 2019 GMC Sierra name the engine (NHTSA’s “Engine” heading — the engine and its cooling system). Filed under the same heading: 648 manufacturer bulletins, 2 NHTSA investigations. Every figure below is a document in a federal file, linked; none is a failure rate, and none is a verdict on any one car.
What owners filed about the engine
Source: NHTSA complaint database2 of the 337 reports a crash · 4 a fire · 1 injury. Self-reported, unverified.
Filed per year: 2019: 6 · 2020: 11 · 2021: 2 · 2022: 6 · 2023: 16 · 2024: 14 · 2025: 156 · 2026: 126
Half of the 75 owners who gave an odometer reading reported the engine problem between 40,000 and 113,000 miles. A median of reports, not the life of a part.
673 complaints in all about the 2019 GMC Sierra, 126 filed in 2026. The whole picture, every system →
Counts are owner reports to NHTSA, not verified defects, and scale with how many of these were sold; nothing here is a rate. NHTSA groups complaints coarsely, so “Engine” means the same area of the vehicle, not one fault.
Across model years: GMC Sierra engine problems, every year on file →
In owners’ own words
Source: NHTSA complaint databaseFiled with NHTSA by the people who own these cars, about the engine. Quoted as written, with anything identifying removed; unverified reports — what was said, not a finding that it was true.
The contact owns a 2019 GMC Sierra Denali. The contact stated that while driving at 30 mph, a "Turn off engine, No oil pressure" message appeared and was accompanied by a warning chime alert. The vehicle was steered to the side of the road and turned off.
The lifters were replaced leas that 2years under warranty at Pooler Chevrolet. They have stated this is a common problem with this vehicle and they had a lot of these vehicles come in with the same exact problem.
I was on the highway going 60mph and the engine light came on and it said “low oil pressure, turn off engine”. I could not safely pull over and had to drive a half mile to do so. The vehicle was towed to the service station near my house that I’ve used before and the problem was a blown high pressure oil line.
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the engine oil cooler line detached causing oil to leak onto the ground. The vehicle was towed to the dealer where it was diagnosed that the engine oil cooler line needed to be replaced.
My 2019 GMC Sierra was traveling on the highway at 70MPH. The oil cooler line detached, and the truck shut down telling me to get over now. There was oil everywhere. I am shocked it did not catch fire. there was also 7 quarts of oil on the highway I called the dealer, and they are well aware of this problem.
What is on file about the engine
Source: NHTSA recalls, investigations and manufacturer communicationsNHTSA investigations
- EA25007 Loss of motive power due to engine failureopened Oct 23, 2025 · open
- The Office of Defects Investigation (ODI) has received 1,157 reports of engine bearing failure failures in the L87 6.2L engine produced by General Motors (GM). Of the 1,157 reports received, 173 are outside of the scope of recall 25V-274. These engines are installed in Model Years (MY) 2019–2024 Chevrolet Silverado 1500 and GMC Sierra 1500, and 2021-2024MY Chevrolet Suburban and Tahoe, GMC Yukon/Y…
- PE25001 Loss of motive power due to engine failureopened Jan 16, 2025 · closed Oct 23, 2025
- On January 16, 2025, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE25001 after receiving complaints and field reports concerning engine failures in MY2019-2024 GM’s full-size truck and SUV T1XX platform equipped with the L87 6.2L V8 engine. These complainants alleged engine bearing failures resulting in knocking and growling noises from the engine’s bottom end and in so…
648 manufacturer bulletins filed under this heading
The 0 newest are listed; every one is on the model year’s page. Quote the document number at a service desk — it is a diagnosis the maker has already written down.
Trouble codes named on this system
P12A6 P0300 P0442 P0455 P2463 U0100 P0107 P0340
Codes a bulletin or an owner’s complaint about the 2019 GMC Sierra names on this model year; a code with a record of its own links it.
Other systems with a record on the 2019 GMC Sierra
Source: the same files- transmission and drivetrain problems 140 complaints
- brake problems 123 complaints
- electrical problems 100 complaints
Common questions
Source: NHTSA complaint database, recalls and manufacturer communicationsAre engine problems common on the 2019 GMC Sierra?
They are documented: NHTSA holds 337 owner complaints naming the engine on this model year (50% of everything owners filed about it), and 648 manufacturer bulletins, 2 NHTSA investigations are filed under the same heading. Whether it is a problem on one particular car is a diagnosis, not a count, and a count says nothing about how many were sold.
Is there a recall for the engine on the 2019 GMC Sierra?
No recall campaign is filed under this heading for this model year (there are 10 filed under other headings). A bulletin is not a recall: it carries no federal duty to repair for free.
When do engine problems show up on the 2019 GMC Sierra?
Owners who gave an odometer reading reported it at a median of 84,000 miles; half of them between 40,000 and 113,000. That is when reports cluster, not the life of a part.
What does NHTSA's "Engine" heading cover?
The engine and its cooling system. Owners choose the heading when they file, so it says which area of the vehicle the complaint is about, not which part failed.