I am getting warning signs on the dashboard saying that my brake booster performance has failed and I need to service the brake booster , the brakes are very hard to press, I need longer stopping distances,and traction control and stability control towing harness my speed has been limited to 43 mph and it's saying that the mass air flow system is has low circuit
2019 GMC Sierra 1500 engine complaints
Page 4 of 12: complaints 71 to 100 of 335, newest first, as owners wrote them.
Engine ceased while driving and shutdown. Towed to dealership. Dealership ran diagnostic test and code P0016 came up. Its 6.2 engine has recall on other years with similar issues
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving approximately 65-70 MPH, the engine seized and made an abnormal sound, nearly causing a semi-truck to jackknife and crash into the vehicle. There was no warning light illuminated. The contact was left stranded in the west desert of Utah, where a wildfire had started, and the contact did not have phone service. Additionally, the vehicle stopped on a two-lane road with heavy semi-truck traffic, leaving the contact frightened and terrified for her safety. The contact jumped out of the vehicle. Migrants who were tending the sheep nearby assisted the contact in pushing the vehicle to the side of the road. The vehicle was towed to the dealer, where it was diagnosed with engine failure, and the dealer determined that the engine needed to be replaced. The vehicle was not repaired. The contact related the failure to the federal safety agency Action Number: EA25007 (ENGINE, ENGINE AND ENGINE COOLING). The manufacturer was notified of the failure, and the contact was misinformed that the model year was not included in the federal safety agency investigation. The contact informed the manufacturer that she no longer felt safe driving the vehicle, regardless of the engine replacement, and the contact advised the manufacturer to guarantee that the failure would not recur after the engine replacement. The manufacturer then referred the contact to the federal safety agency Hotline for assistance in investigating the safety issue. The vehicle was not repaired. The failure mileage was 122,187.
The contact owns a 2019 GMC Sierra 1500 Denali. The contact stated that while driving at an undisclosed speed on a local roadway, the oil pressure warning light illuminated. The contact stated that oil was leaking from the vehicle. The vehicle was towed to the residence. The vehicle was then taken to the dealer, where it was diagnosed, and it was determined that the engine had seized. The manufacturer was not notified of the failure. The approximate failure mileage was 71,000.
While passing a vehicle the engine failed and had to replace the engine. The cams and lifters went out.
driving and truck started to misfire (due to collapsed lifter after shop diagnosis) that then made my truck do reduced steering assist and my wheel got super hard to turn that almost sent me in the ditch at 60MPH and also turned off my Electronic Stability Control and also turned on my Service Parking Brake drove straight to the shop and parked it very lucky i did not crash and the fact that multiple people this has happend too GM need to recall from the 2019 and up for these lifters after reading about it.
While I was slowing down when approaching a red light, the engine abruptly shut off and had no warning or anything. Then once stopped the engine would no longer crank leaving me stranded in the middle of a busy roadway.
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving approximately 5 MPH, the rear wheels locked up. The check engine warning light was illuminated. The vehicle was taken to a local dealer, where it was diagnosed, and determined that the brakes needed to be replaced. The vehicle was repaired; however, the failure recurred intermittently. The vehicle was taken to another local dealer, Walker Bros Chevrolet (700 Erie St, Edinboro, PA 16412); for a second opinion, and the transmission and TCM were replaced. The vehicle was repaired; however, the failure reoccurred. Upon further investigation, the contact related the failure to the Customer Satisfaction Program: N192272400; however, the VIN was not included. The manufacturer was notified of the failure, and a case was filed. The failure mileage was approximately 40,000.
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving approximately 45 MPH, the accelerator pedal was depressed; however, the vehicle lost automotive power and stalled. Several unknown warning lights were illuminated when the vehicle stalled. The contact was unable to restart the vehicle, and the vehicle was towed to the residence. The contact became aware that the 400 AMP fuse was blown. The contact replaced the fuse and replaced the starter, however during a test drive, the vehicle stalled. The vehicle was taken back to the residence, and a 400-AMP fuse was replaced a second time. The contact also replaced the starter, the alternator and replaced the ground cables, and during another test drive, the vehicle stalled. The vehicle was taken back to the residence and the contact determined that the engine had seized. The vehicle was not repaired. The manufacturer was informed of the failure. The contact researched online and related the failure to the federal safety agency Campaign Number: 25V274000 (Engine and Engine Cooling); however, the VIN was not included in the recall. The failure mileage was approximately 159,000.
Lifter failure cylinder #8, this is a 2019 GMC Sierra Denali 4x4. It has a 6.2L engine. With 92823 miles on it. It would be nice if GM would do a recall on this year motor as well.
I have a 2019 GMC AT4 and it has stalled on the highway multiple times and smokes every time I started. I have read that the engine in it has been recalled on multiple other years but the one I purchased needs a $25,000 repair and it’s not safe to drive. There is not a current recall, but I’ve read that this engine on almost all the other trucks and SUVs that have it have had problems.
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.
I had left work and pulled out of the parking lot to head towards the freeway. I had driven about 3 blocks and the truck made an indicator alert noise. My dash panel said reduced power mode or something to that effect. The truck felt as if it lost power. Luckily I was able to pull to the side of the road at which point I put it into park and shut it off. I waited a moment and then tried to restart it. The dash panel said something but it was too fast for me to read before it went away. The engine was cranking but it did not restart. I tried several more times before calling roadside assistance to have it towed to a nearby dealership. The dealership said that I would need to replace the engine $18,751.92. They said the Camshaft RPM are 0 while the crankshaft RPM is 2-300. Lifters and Rockers are not moving. The chain is most likely broke as well. The fuel pressure is about 30 psi in the high side. It would be just as expensive if not more to try and repair the existing engine if it is even repairable which they wouldn't know until they took it apart at which point I would have to pay for that as well even if it was not salvageable. They would need to replace the oil lines and cooler as well because debris from the engine could be in them and would do more damage if not replaced. I had already replaced the oil lines and cooler within the last 6 months. The truck has 114,000 miles. My warranty still had 3 months on it but the mileage stopped at 100,000 so I am out of luck. When I researched online to see what it could be I saw there are known problems with this 6.2 L87 engine and that many fail around 100,000 miles. There are other recalls but the 2019 was not included in the recall. If I choose to have the work done it will take several weeks in which I will now have to rent a car as well. Not much of a choice when I still owe $30,000 and they only offered me $9,000 for it as is with the bad engine.
The engine suddenly seized and now needs to be replaced. Regular oil changes, no leaks, and the engine just seized up and won't run. 5.3L V8.
While accelerating from a stop, the oil pressure warning illuminated. The driver immediately pulled over within approximately 0.15 miles and shut the engine off. Oil was actively leaking from the vehicle. The truck was towed and diagnosed with oil cooler line separation at the crimp fitting, resulting in rapid oil loss and catastrophic engine failure. Sudden oil loss while driving creates a safety hazard. This failure appears consistent with known issues involving oil cooler line assemblies on similar vehicles.
I was driving my vehicle on the highway doing normal highway speed, when I began to hear an odd noise coming from the engine area. I slowed down and moved into the slow lane at which time the noise became worse. The vehicle then lost power and I wasn’t able to get the vehicle to do over 40mph. I was able to exit the highway and limp my vehicle home. I had the vehicle towed to a GMC dealership the following morning. After about ten days, I was contacted by the dealer and was advised that I had an engine failure and that my vehicle required a new engine.
The contact owns a 2019 GMC Sierra 1500. The contact stated that while stopped, there was an abnormally loud sound coming from the vehicle. The vehicle was consuming an excessive amount of engine oil. The engine and transmission warning lights were illuminated. The vehicle was initially taken to the local dealer; however, the dealer was unable to determine the cause of the failure. The vehicle was later diagnosed, and it was determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the issue and referred the contact to the federal safety agency Hotline for assistance. The failure mileage was approximately 106,000.
My vehicle is at the dealership now - it wasn’t starting properly, started always getting low on oil which I took to the dealership for them to monitor- and then the check engine light came on- once that came on just last Thursday I did not drive the vehicle except to the dealership to be inspected - which my appt was Monday and they found metal shavings in the oil and said the whole engine needs replacement!
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at various speeds, the vehicle lost automotive power; however, the vehicle maintained electrical power. The check engine warning light was illuminated. The vehicle was towed to a local service center, where it was diagnosed and determined that the battery needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The vehicle was taken back to the same local dealer and remained for additional investigation. The contact attempted to restart the vehicle several times and shift into different gears; however, the failure reoccurred. The local dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline for assistance. The failure mileage was approximately 103,000.
Engine knocking, constantly kicking into limp mode, shaking when driving. Taken to GMC and local repair shops. Limp mode will not stop kicking on. Now other issues will mean total engine replacement needed. Mechanic says it’s not worth repairing at this point. Only 109k miles on it.
Lifter failure and camshaft failure twice
My Truck Was 123369 Milles Was Driving And Stop At My Work Turn Off The Vehicle and After That Re-Start The Vehicle And The Vehicle Not Start The Check Engine Light Coming on Im Tow The Tuck To The Dealer Were I Do All My Service They Check The Truck After A Mont And They Told Me The Engine Timing Off Due To Camshaft Gear Spun On Camshaf Which Sheared Locator Pin Valve Timing Off So That Enging Does Not Build Compression In Any Cylinder Recommende Enging Replacement Due To Nature Of Failure-Extensive Mechanical Damge Internaly To The Camshatf And The Warranty Was Over
This truck is equipped with the 6.2L L87 and the motor seized up and shut off with no dash light warning and i stalled and rolled over a curb! This is very dangerous and now i have to pay 10k + out of Pocket for an engine replacement! Truck has low miles this is unacceptable and it needs to be in the recall , this is dangerous and it hurts people !
dangerous lost of propulsion in traffic while my minor daughter was in the vehicle, I was driving my truck that has a 6.2 Engine gmc that is currently being reviewed Engineering Analysis EA25-007, I bought engine back in October 2025 and incident happen Early March 2026 Around 10,000 miles
I was driving in a city at 30 miles per hour no acceleration and no load. I lost oil pressure, dumped all the oil out of the crankcase and then the engine locked up. I had it towed to my mechanic shop that i have work done. The technician diagnosed it as a failed oil cooler pressure supply line. Where the solid steel line crimps to a rubber oil hose, that connection had not been applied enough pressure and the rubber line became separated from the steel line.
While driving down the highway experienced a partial loss of engine power causing jerky/rough operation, harsh shifting, and unpredictable behavior. Was told by the dealer service manager that it was likely a misfire in one of the cylinders. After diagnostics and servicing that included changing spark plugs, wires, and a full engine service it was later confirmed to most likely be due to a stuck lifter and will require a complete engine replacement. I have subsequently learned that this is a common problem with this L87 engine and may be an early indicator of failing crank bearings associated with a recall for later model years of my same vehicle. Seems to me that recall ought to be expanded to include earlier models with L87 engines.
Driving down the Interstate 35 in Tarrant County, Texas. Engine locked up. Towed to dealership. Dealership determined that engine is locked up. Had dealership verify oil level was okay and they confirmed that it was. Oil had been services two weeks ago. Engine is a 6.2 L but not the L87 block. Milage on the vehicle is 149,752.
Engine shut off while driving and steering wheel wouldn’t let me turn and I drove up on a curb into someone’s yard , There should be a recall on these trucks with the 6.2L in the year 2019, this is very dangerous I could of injured myself on injured someone else. This needs to be addressed!!
The 2019 GMC Sierra AT4 with the 6.2L V8 engine began making a rattling or tapping noise at 45 mph. No warning lights appeared on the dashboard. When starting the engine and idling, a similar noise can be heard from the engine. I bought the vehicle used from a dealership one month ago, with 80,000 miles, and the second issue is the complete failure of the blind spot warning system on both mirrors. It was a one-owner vehicle with a clean Carfax. I am scheduled to take the vehicle to the dealership's service department for a full inspection.
Engine oil pump solenoid. Diagnostic code P06DD.
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