2019 GMC Sierra 1500: check engine light

Filed Nov 5, 2026 · Engine, Transmission · AL

1. The engine has failed. Yes it is available upon request. 2. My safety was put at results because the vehicle loss power/pressure as I was driving. 3. Yes the problem has been confirmed by an independent service center. 4.The vehicle has been inspected by an ASE Certified Mechanic. 5. The engine light came on in the vehicle. Carshield Denied Claim, therefore I am responsible for the repairs. I spoke with GMC and it was nothing they could do and advised me to contact the federal safety agency.

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 Oct 11, 2026 · Engine · AL

The engine started making a loud knocking noise and lost power. Luckily the event happened in a neighborhood and no one got hurt. The check engine has been on for brief periods prior to this event.

Filed Oct 9, 2026 · Engine · WI

The engine developed a noise while driving. The engine has been replaced. So inspection of the original engine is not available. The failure happen on the interstate system in a large metropolitan city, in heavy traffic. Our independent service center confirmed that one cylinder was not working. We had messages about brakes needing service, the ECS needed servicing. check engine light was flashing. These items came on about 5 minutes before we pulled off the interstate system.

Filed Oct 5, 2026 · Engine, Transmission · 120,500 miles · TX

The contact owns a 2019 GMC Sierra 1500. While driving 65 MPH with cruise control activated, the messages "Service ESC", "Service Park Brake", and an unknown message was displayed, causing the cruise control to deactivate. The check engine and transmission warning lights illuminated. The vehicle was jerking and the transmission was lagging while driving. The vehicle was taken to the dealer, who determined that the camshaft and lifter needed to be replaced. The manufacturer was notified of the failure by phone and advised the contact to file a complaint with the federal safety agency Hotline. The failure mileage was approximately 120,500.

Filed Oct 2, 2026 · Transmission · FL

Engine failure. My engine is near failure, loud knocking, check engine light and trusted repair shop analyzed. The repair diagnosis is that the engine will fail in the very near future and that is not safe to drive because of risk of failure. I like the truck and it is still in great condition (129k miles). So, I search for recall information and see the 6.2L 2021-2024 recall and see there is additional investigation underway on newer models. Is it possible it goes back to the redesign of the pick-up in 2019? It sounds like the same issue.

Filed Sep 21, 2026 · Engine · 113,000 miles · OK

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving 35 MPH, the vehicle lost automotive power. There was no warning light illuminated. The contact attempted to restart the vehicle, and the check engine warning light illuminated. The vehicle was towed to an independent mechanic to be diagnosed, and DTC: P0016 was retrieved. The contact was informed that the engine needed to be replaced due to catastrophic engine failure. The manufacturer was notified of the failure. The failure mileage was 113,000.

Filed Jul 13, 2026 · Engine · 83,000 miles · FL

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at 25 MPH, the check engine warning light illuminated, and the engine started knocking. The contact pulled over immediately and contacted an independent mechanic, who recommended continuing to continue driving at a slow speed. The contact resumed driving to the residence. The contact's son, who was a highly skilled mechanic, diagnosed that the left bank lifters had failed. The vehicle was not repaired. The dealer was contacted several times and informed that the VIN was not included in a recall and referred the contact to the manufacturer for assistance. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 83,000.

Filed Jun 11, 2026 · Engine · FL

On May 27, 2026, I was on my way home from work when I went to accelerate the vehicle and all the sudden it started shaking and the check engine light came on with the EBS. I was able to get the vehicle to a repair shop local the next day, who took the car apart. What was thought to be an easy fix of spark plugs and fuel injector, became even more after they put back together and the cylinder was still misfiring. After several hours of taking apart the engine, the mechanic determined that the hydraulic valve lifters had failed. This has been an ongoing issue with with the 5.8L V8. Due to a recall not being under the vin yet, i have now incured a $16k expense to add an engine to it after i purchased it in Nov of 25 at $97,000. This is a saftey issue and luckily no one was hurt when the car started shaking and couldn't go over a certain speed. I want this reviewed and looked at for possible reimbursement as there have been several other vehicles with the same known issue.

Filed Jun 9, 2026 · Engine · AZ

While towing Jetski's the #2 Cylinder has a persistent misfire. Was able to limp to Chapman Chevrolet where it took 2 days to diagnose. Vehicle is below 70K, which just recieved a brand new transmission and torque converter due to metal shavings from converter getting pushed through to the transmission. Service Advisor's Message below: "Performed further diagnosis and requested engine teardown to determine root cause of misfire. During disassembly, found cylinder #2 intake/exhaust valve train failure, including a bent pushrod and a severely scored/collapsed lifter. Inspection revealed the damaged lifter had caused abnormal contact with the camshaft lobe, resulting in significant scoring and wear of the camshaft. The failed lifter and bent pushrod led to loss of proper valve operation and cylinder misfire. Point of failure is lifter #2 that resulted in camshaft failure as consequence. I am in the process of generating a quote and taking pictures for the extended warranty." Seems like another AFM/DFM issue has brought down another GM Motor. Why are these motors not part of the recall, when they are going down the same was as the recall? My safety and my family were put at risk for a possible catastrophic failure and loss of power due to the engine being faulty. There were no warning laps, just Check engine Light, Parking Break Wrench Light. The only other sign was a quite tick that is with most Chevy/GM Motors.

Filed May 27, 2026 · Engine, Fuel system · VA

While driving, the vehicle suddenly began running rough, losing power, and displaying engine warning lights. Due to the severity of the issue, the vehicle was towed to a GMC dealership for diagnosis. The dealership diagnosed lifter failure and a cracked cylinder head. The dealership also documented coolant intrusion, oil/coolant contamination, and evidence of internal engine damage. Repairs were attempted, including replacement of the cylinder head and lifter. After the repairs were completed, the vehicle never left the dealership because it continued misfiring on the same cylinder. GM later determined the engine had a failed piston ring and scored engine block requiring complete engine replacement. The vehicle has approximately 55,000 miles, has been properly maintained, and was purchased new. This catastrophic engine failure resulted in loss of power and major internal engine damage at relatively low mileage. I also opened a case directly with GM Customer Assistance regarding this failure. The case involved multiple escalations after the initial repair attempt failed and the vehicle ultimately required full engine replacement. GM ultimately advised that only partial assistance toward the engine replacement would be provided, leaving the customer responsible for a significant portion of the repair cost. I am submitting this complaint because this vehicle appears consistent with the ongoing the federal safety agency investigation involving GM 6.2L L87 engine failures and loss of motive power.

Filed May 11, 2026 · Engine · 77,000 miles · FL

The contact owns a 2019 GMC Sierra. The contact stated that while driving at 20 MPH, the check engine light began to flash. The driver pulled over. The vehicle was knocking. The contact stated that failure was due to premature engine failure. The vehicle was towed to the local dealer, where it was diagnosed with a cylinder 3 lifter malfunction. The vehicle had misfired. The vehicle was not repaired. The manufacturer was notified, but no assistance was provided. The failure mileage was approximately 77,000.