2019 GMC Sierra 1500: excessive oil consumption

Filed Oct 20, 2026 · Engine, Fuel system · FL

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 federal safety agency 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.

Filed Sep 23, 2026 · Engine · IA

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.

Filed Sep 11, 2026 · Engine · OH

Since I purchased my vehicle in 2021, I continued to have issues with my oil pressure light coming on usually about 2000 - 3000 miles past the oil change. When checking oil, I would find that it was low 2 quarts of oil each time. I reported this to the GM Dealer and they did oil consumption tests and determined the oil loss was within GM tolerances. So apparently it is ok to burn a quart of oil every 1000 - 1500 miles. Then fast forward to January 2025, apparently my rear main seal was blown out. Unfortunately by then my Powertrain warranty had expired. So that cost $3,794. Now fast forward to March 2026, I hear a noise in my engine and notice it is leaking oil again. Upon taking it back to the dealer, they tell me the engine needs replaced or rebuilt. The rear main seal is bad again, a lifter bad and they specifically say "The engine still has excessive blowby due to stuck piston rings or a scored cylinder". This is the first time it was ever reported to me that the engine as blowby. Regardless of all this, I had to replace this engine with less than 117,000 miles on it. I was reporting the oil issue when it was well under the powertrain warranty, but the first Oil Consumption test was done at 51,946. So again under powertrain warranty. However I continued to tell them about it until these issues occurred. Now I have $10,912.75 invested in repairing/replacing an engine. I pushed it to GMC Customer service and they didn't want to help. However when investigating this issue with other mechanics, they all seem to know about all the issues these L87 engines have. Then I found out that 2021 - 2024 L87 engines were recalled, but my 2019 was not. It appears my engine has similar issues as the recall. I was just lucky enough that nothing happened while I was driving. So I asked that if a recall occurs that GMC should be responsible for refunding all of this money as they should have taken care of it when I told them 100,000 miles ago.

Filed Apr 10, 2026 · Engine · 80,000 miles · IL

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving at approximately 70 MPH on the interstate, the vehicle experienced a sudden loss of engine power and decelerated rapidly, nearly causing an accident. The contact managed to pull off the road, but the failure persisted. Additionally, the contact reported a prior history of excessive oil consumption. During a previous visit to the dealer, the contact was advised to shorten the vehicle oil change intervals from 10,000 miles to 5,000 miles to mitigate the oil loss. The contact stated that the dealer failed to determine that the excessive oil consumption was an early symptom of the current engine failure. The vehicle was towed to a dealer, where it was diagnosed and determined that the belt filter and the piston needed to be replaced within the camshaft assembly. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 80,000.

Filed Dec 1, 2025 · Engine · 87,000 miles · PA

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at various speeds, the vehicle hesitated and failed to properly accelerate while the accelerator pedal was depressed. No warning light was illuminated. In addition, the contact was aware of excessive oil consumption and the vehicle was previously taken to a local dealer. An appointment with the same local dealer was scheduled to inspect the vehicle. The vehicle was not yet repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 87,000.

Filed Nov 4, 2025 · Engine · ME

Driving at night when the low oil light came on then engine failed. Engine is now blown and will not run. Engine L87.

Filed Nov 1, 2025 · Engine · SC

I keep getting low oil warning even after oil change

Filed May 6, 2025 · Engine, Steering · GA

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)

Filed Feb 21, 2023 · Engine · MA

While driving on the highway, I got a message that said "low oil pressure, turn off engine" with red flashing lights. I could also smell burning oil and metal. I immediately pulled over and turned off my engine. When I exited my truck, I could see all of the oil that remained in my engine leaking onto the ground. My truck was towed to a local repair shop and they advised me that this is a common problem in this truck. The oil line blew likely due to a defective crimp. The mechanics can't repair the problem right away because this line is on a national backorder and there is no aftermarket option. This obviously happens too often if this part is on backorder. The mechanics believe there may have been damage done to the engine as a result of losing all of the oil on the highway.

Filed Apr 12, 2022 · Engine · 33,000 miles · IL

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. The vehicle was not repaired and remained at the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 33,000.