2019 GMC Sierra 1500 complaints

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 transmission has a shudder at various speeds.

The contact's partner owns a 2019 GMC Sierra 1500. The contact stated that upon starting the vehicle, the "Service Brake System" and ABS warning lights illuminated. The brake pedal was depressed to the floorboard, and the message that the vehicle would not exceed 62 MPH was displayed. The vehicle was restarted, and several unknown warning lights were illuminated with a message that the vehicle would not accelerate above 42 MPH. The vehicle was taken to a dealer, where a diagnostic test was performed and the diagnostic test revealed that the brake pipe had seized in the brake master cylinder and that the pipe fitting threads were damaged. The contact was informed that the brake master cylinder and the reservoir seal needed to be replaced. Despite the repair, the dealer stated that the master cylinder and brake line fitting were still defective. After several additional repairs to the brake system, the vehicle was returned to the owner. Upon driving the vehicle, the contact stated that the prior brake warning lights returned on the instrument panel. The vehicle was returned to the dealer and remained with the dealer. Upon investigation, the contact discovered NHTSA Campaign Number: 20V055000 (Service Brakes, Hydraulic); and associated the failure with the recall. The manufacturer was notified of the failure, and the contact was informed that the vehicle was not included in the recall. The contact was then given a case number. The contact was also transferred to the NHTSA Hotlin

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 NHTSA 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 NHTSA Hotline for assistance. The failure mileage was approximately 103,000.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle vibrated and felt as if the transmission was going to unexpectedly downshift. No warning light was illuminated. In addition, there was an abnormal sound coming from the rear wheels. The contact stated that it felt like the rear tires were driving in the wrong gear. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The contact stated that the failure persisted and became a worsening failure. The manufacturer was not notified of the failure. The failure mileage was approximately 75,000.

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.

Transmission shudder and vibration at highway speed.

THE PARK ASSIST WOULD GO ON WHEN I WAS AT A STOP LIGHT AND NO ONE WAS IN FRONT OF ME AND AUTO STOP WAS OFF ALL THE TIME. TWO GROUND STRAPS WERE CORRODED. THERE IS A RECALL ON THEM FROM 2019 TO 2024. MY TRUCK DID NOT HAVE A RECALL ON IT. I JUST WANT TO LET YOU KNOW AND MAYBE IF ENOUGH PEOPLE COMPLAIN, YOU WILL PUT ALL TRUCKS ON THE RECALL.

The transmission valve body was trying to lock up while driving and making it shimmy and shift hard. I took it to Davis GMC in [XXX] . They diagnosed it with the transmission malfunction (this is the same transmission that is under recall in the 2020 models)j. I paid $8660.33 to have them replace the transmission. It has been approximately 6 months and 6.000 miles and now this transmission is shuttering, also. I took it back to Davis GMC and the technician told me that I didn't know how to drive a 10 speed automatic! I then took it to TriLakes Motor in [XXX] where they made an adjustment on it. That has not fixed the problem. Today I contacted the main GMC center and started a case number: XXX. They suggessted taking it back to a dealership again and trying to get it fixed again. I feel like I am stuck with a truck that can not be fixed and should be in the recall due to it having the same transmission as the other GMC Sierra's that are under recall. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

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

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

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 !

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!!

Engine oil pump solenoid. Diagnostic code P06DD.

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.

The oil cooler line is leaking, and the vehicle is available for inspection upon request. This safety concern is addressed under GM Program N192220080. The Hazard is Present: The leak is active. The risk of total line detachment and engine seizure is the same in Texas as it is in Alaska (the US state the GMC recalled the exact same part). An engine seizure and loss of propulsion is an immediate danger to passengers within the effected vehicle, as well as the other vehicles on the road. The Admission of Defect: GM’s offer to provide the part (Part #85136335) confirms that my vehicle’s hardware is part of the failed batch. The vehicle was inspected by an authorized GMC dealership on 01/14/2026, confirming the leak and potential safety hazard with continued driving of the vehicle. The issue was submitted to the GM Customer Care team, Case #[XXX]. The only warning of the defective oil cooler line leak was oil on the ground underneath the vehicle after driving. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at 45 MPH, the vehicle stopped unintendedly. The message “Low Oil Pressure - Shutoff Engine” was displayed. The contact stated that the vehicle was towed to an independent mechanic, where it was determined that the failure was due to rod bearing failure. The local dealer was contacted and confirmed that there was no warranty coverage on the vehicle. The vehicle was not diagnosed or repaired. The manufacturer was contacted and confirmed that there was no warranty coverage. The failure mileage was approximately 105,000.

Engine light came on, along with 'Service ESC' and 'Service Parking Brake' I drove it to my local GMC and it continued smoking and they told me that if I drove it like that it could blow up the engine. They mentioned a recall on these types of trucks but they said the warranty on my vehicle had expired at 60000 miles. Yes, I took it to Rogers GMC in Hermiston and the diagnostic is, "Mechanical: Valve Lifters - Remove and Replace" Totaling repairs to about $7000 Before this nothing was wrong, I drove it to work everyday and one evening when I turned it on the dashboard lit up and it started smoking.

The contact owns a 2019 GMC Sierra 1500. The contact stated that the wheels on the vehicle were not what was listed in the description of the vehicle. The vehicles installed on the vehicle were 17-inch wheels instead of the 18-inch wheels listed as the original equipment for the vehicle. The contact was concerned that the difference between the OEM wheels and the wheels installed on the vehicle could cause ABS failures while driving the vehicle. The contact referenced NHTSA ID Number: 21V985000 (TIRES), but the VIN was not included in the recall. The dealer was not notified of the issue. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 44,741.

On 2/4/2026, my vehicle (2019 GMC Sierra AT4 and VIN # 3GTP9EED5KG240494) experienced a catastrophic failure of the engine oil cooler lines. This is a well-documented manufacturing defect involving the failure of the crimp joints between the rubber hose and metal tubing. This failure occurred abruptly, causing massive oil loss and posing a severe safety risk due to the potential for sudden loss of oil pressure and engine seizure while operating the vehicle at highway speeds. This specific component failure is recognized by General Motors under Customer Satisfaction Program (CSP) N212326940. GM explicitly acknowledged this failure as a manufacturing defect. Despite the fact that the defect is inherent to the part’s design—and not a result of typical "wear and tear"—GM has denied my request for reimbursement, citing that the vehicle is outside the standard 36,000-mile warranty period. I exhausted all good-faith efforts to resolve this through GMC’s internal escalation process. I spoke with a representative and a supervisor, both of whom refused to honor a reimbursement request based on the manufacturing defect. They refused to consider that the defect, as documented in GM’s own internal bulletins, is independent of mileage and that the repair was performed at an authorized GM dealership. I am seeking full reimbursement of $2,171.58 for the repair of a known, safety-related manufacturing defect. GM is failing to stand behind their "Professional Grade" standards by refusing to co

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the brake pedal was depressed, and the brakes seized. No warning lights were illuminated. The contact parked the vehicle. The contact inspected the vehicle; however, the failure reoccurred. The contact attempted to drive the vehicle several times, but the failure reoccurred. The contact stated that the failure was persistent. Due to the failures, the contact was almost in two crashes. The vehicle was towed to an independent mechanic, where it was diagnosed with a brake module reset. The independent mechanic contacted the dealer and was informed that the brake module needed to be reset. The technician from the dealer installed the software for the brake module reset, and the vehicle was repaired. The vehicle was retrieved, but the failure reoccurred a month later. The vehicle was towed to the dealer, and the contact was informed that the vehicle needed to be inspected by the engineer. The vehicle was not diagnosed or repaired. The contact was advised to continue driving the vehicle. The contact was advised to disable all the safety features. The contact stated that two major crashes were averted and refused to drive the vehicle until it was repaired. The contact stated that the failure was common with the vehicle. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 68,000.

While driving my 2019 GMC Sierra with approximately 119,000 miles the engine suddenly made a loud bang, started shaking violently, backfiring, and missing out. Took it to dealer. They diagnosed the problem as a rod failure with camshaft damage. Quoted repair cost $12,000. After repair, they were doing a 25 mile test drive before returning the truck to me. After only 20 miles, the engine completely failed. Now it needs an entire new engine. I am waiting for them to reply what the cost is. The truck was maintained exactly as required in the owners manual at General Motors dealers

The DFM program in the engine caused the lifters to fail and bend a pushrod which in turn scared the cam shaft. There were no signs leading up to this. It caused the traction control and brake systems to be compromised. I took vehicle into a gm dealer and had it diagnosed.

On Wednesday, January 7th, 2026, my wife and I were traveling North on the Northeast Extension of the Pennsylvania Turnpike (476) at approximately 9:00 pm. A check engine light came on with no other symptoms, we start to get off the next exit. While still on the highway, the motor turns off with a warning to put it in neutral and restart. It would not restart and coasted off the exit and into a convenience store parking lot. There was noise, just turned off. We got stuck in the town for over 2 days before getting a tow 209 miles to the mechanic shop. We were miles from any mechanic shop and tried to troubleshoot while waiting and to no avail. First mechanic had to send it to a second because it looked like the engine had seized and that was confirmed at the second mechanic shop. Apparently the bearings in the lower end seized. The only thing they could offer was to replace the motor. It had proper amounts of fluids and didn't overheat. The motor replacement is approximately $10,800.00 in addition to having no vehicle there was additional towing and breakdown expenses (food and lodging for 2 nights and 3 days)

Engine loss of power many different engine code took it to the dealership. Now they say lifters, rockers are loose and worn,broken,the cylinder 5 misfire, engine needs rebuild at 88,000 miles. Dealer wants over ten thousand dollars to take apart and repair

While driving 13-15mph down the road the front right upper control arm ball bearing sheared off causing the tire to lean in rubbing the wheel well, forcing my truck to veer to the left across the other lane of traffic. Luckily there wasn't any car next to me.

For the past month I have noticed my truck has been dripping oil, I pulled the shield off and saw my engine oil cooler lines leaking at the crimp points. I’ve seen GM put out customer satisfaction notice but when I tried to have the dealership fix mine they said mine is covered under any recall or warranty. If the line comes uncrimped at highway speeds I’ll lose all my oil where the trucks engine could lock up and lose all forward motion and in my eyes could cause a crash

The contact owns a 2019 GMC Sierra 1500. The contact stated that the vehicle made an abnormal rattling sound while idling. Additionally, while driving at 45 MPH, the message "Reduced Power" was displayed, the check engine warning light illuminated, and the vehicle stalled. The contact was able to coast to the shoulder of the roadway. The vehicle failed to restart and was towed to the dealer, where it was diagnosed and determined that there was no compression in the engine. The dealer determined that the engine needed to be replaced. The dealer advised the contact that the repair was not covered because the VIN was not under recall. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 126,000.

After a really bad cold snap noticed oil spots on my driveway, after further inspection noticed the oil cooler lines were leaking from the crimps. Got in contact with GM because there was a customer satisfaction program for my year model- N212326940- they told me it did not apply to my truck but it is a know issue, and now I’m having to come out of pocket for it.

Catastrophic engine failure to due connecting rod bearings spun on the crankshaft damaging the crank and sending bearing material throughout the oil galleries

Catastrophic engine failure. Engine failed while driving and lost all oil pressure. Nearly cause accident

While pulling a small trailer to go hunting, the engine just lost all power while merging onto the freeway. I had to pull over to the shoulder in high speed traffic because the truck had no power and had an odd clanking sound. When I took it to the dealer for repair, they stated that the lifter failed and also damaged the cam. This required a full engine rebuild. When the dealer went to test drive the truck with the new parts, ANOTHER lifter failed and also affected the cam again which required another rebuild.

This vehicle shudders and vibrates during shifting and acceleration at different speeds. Transmission shifts out of gear quite often leaving me stranded at times trying to make it safely out of traffic.

On January 15, 2026, my wife was driving our 2019 GMC 1500 Sierra Denali and the lights on the dash came on with the truck losing power. I made to my wife later in the day and was able to drive the truck to the dealership only achieving 15mph for about 5 miles. The Mike Bell Chevrolet Dealership in Carrolton GA stated that my engine was knocking and needed to be replaced. I took my truck the John Thornton Buick GMC dealership on January 22 to get a second opinion and they stated the exact same thing stating the engine needs to be replaced. The dealership is stating the remanufactured replacement issue is over $10,900. My truck has over 271,000 miles.

My vehicle recently experienced a sudden flashing check engine light, severe misfiring, and rough engine operation, creating an unsafe driving condition. An inspection by an authorized GMC dealership, Serra Buick GMC Champaign, confirmed a failed deactivating valve lifter on Cylinder 5, documenting that the lifter ceased movement after a single engine rotation. The dealership advised that the failure necessitates replacement of all lifters and extensive internal engine components, at an estimated cost of $5,650.75. This defect is not isolated, unforeseeable, or the result of consumer misuse. It is directly associated with General Motors’ Active Fuel Management (AFM) system, which has been widely reported to cause: •Premature lifter collapse •Camshaft damage •Severe engine misfires •Loss of power while driving •Catastrophic engine failure

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at various speeds, the braking system had erroneously activated, causing the vehicle to abruptly stop in the middle of the road. The vehicle was towed to the local dealer, who diagnosed that the failure was caused by an engine malfunction of the number six cylinder. The vehicle was repaired. No further information was available. After retrieving the vehicle, the contact was driving approximately 10 MPH when the failure reoccurred and the braking system erroneously activated, causing the vehicle to abruptly stop. During the incident, the driver's head slammed into the steering wheel, causing a head laceration. No medical treatment was required. The vehicle was towed back to the dealer. The cause of the failure was not yet determined. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 120,000.

IntelliBeam will sometimes allow me to activate the system but will turn itself off and not allow it to be reactivated until the power is cycled. Other times it will not activate at all. This is on a dark backroad with no traffic.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at various speeds, there was an abnormally loud clamoring sound coming from the engine. There was no warning light illuminated. The vehicle was taken to a dealer, and the mechanic informed the contact that the engine might fail soon. The contact was able to continue driving the vehicle, but the contact was advised to bring the vehicle back if the failure worsened. The following day, the contact stated that the front of the vehicle started shaking with several unknown warning lights illuminated on the instrument panel. The vehicle was taken back to the dealer and remained with the dealer undiagnosed. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 71,000.

While driving in traffic in March 2025, the vehicle experienced a sudden and complete engine failure, creating an unsafe condition. Subsequent diagnosis confirmed failure of the camshaft and lifters, requiring full engine replacement. General Motors declined to cover this repair. However, this failure is consistent with widely reported camshaft and lifter issues affecting other GMC and GM vehicles equipped with the same 6.2L engine platform. Due to the unavailability of replacement engines through GM, I was forced to wait several months for an engine sourced through Jasper Engines. During this time, the vehicle was inoperable, resulting in over $10,000 in out-of-pocket expenses, including extended rental vehicle costs. The engine replacement was completed by Camden Automotive and Diesel in Camden, South Carolina, who maintain all service and maintenance records related to this repair.

Vehicle is having loss of oil issues.

Catastrophic engine failure of known defective L87 engine

I have the L87- 6.2 V8 and my crankshaft bearings burned up at highway speeds and the truck shut down. The is a massive recall on this engine for this reason but does not include the 2019 model and it most definitely should. The issue started in 2019 (not 2021).

ENGINE COOLER LINE DETACHED FROM CRIMP CAUSING ENGINE TO DRAIN OIL RAPIDLY AND ENGINE SEIZED. THE OIL PRESSURE WARNING LIGHT CAME ON, AND THE TRUCK WAS IMMEDIATELY SHUT DOWN (WITHIN 10 SECONDS). WE WERE PUT AT RISK BECAUSE WE TRIED TO COAST OUT OF TRAFFIC AND PARK IT ON A SHOULDER TO PREVENT BEING STRUCK BY ONCOMING TRAFFIC. TRUCK WAS TOWED TO DEALER WHERE WE WERE TOLD THE ENGINE WAS SEIZED AND WE WOULD HAVE TO PAY FOR A NEW ENGINE. DIGGING INTO THIS FURTHER, GM HAD PUT A SERVICE BULLETIN FOR THIS EXACT ISSUE OUT ON THIS YEAR OF TRUCK. (N212326940-01). I BROUGHT THIS UP TO THE DEALER AND THEY TOLD ME THAT MY SPECIFIC TRUCK WASN'T INCLUDED IN THE RECALL AND WOULDN'T BE COVERED.

Engine started knocking so took to the GMC dealer they said the engine needs to be replaced.