GMC Sierra Complaints (2019)

729 consumer complaints on file.

#11723796March 12, 2026
ENGINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11723512March 11, 2026
ENGINE
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!!
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11723178March 9, 2026
ENGINE, LANE DEPARTURE: BLIND SPOT DETECTION
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11722893March 9, 2026
ENGINE
Engine oil pump solenoid. Diagnostic code P06DD.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11722687March 7, 2026
ENGINE, POWER TRAIN
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)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11722065March 4, 2026
ENGINE AND ENGINE COOLING
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11721822March 3, 2026
ENGINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11721515March 2, 2026
WHEELS:RIM
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11721265March 1, 2026
POWER TRAIN
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 cover a part they have already admitted is defective. I request that your office mediate this dispute to facilitate a full refund of my out-of-pocket repair costs.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11720355February 25, 2026
SERVICE BRAKES, HYDRAULIC
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719894February 23, 2026
ENGINE
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
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719331February 20, 2026
ENGINE, VEHICLE SPEED CONTROL
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11719521February 20, 2026
ENGINE, POWER TRAIN
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)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11718761February 18, 2026
ENGINE
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
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11718386February 17, 2026
STEERING, SUSPENSION
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11718326February 16, 2026
UNKNOWN OR OTHER, ENGINE
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
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11717761February 13, 2026
FUEL SYSTEM, GASOLINE
The contact owned a 2019 GMC Sierra 2500. The contact stated that on several occasions while driving at undisclosed speeds, the vehicle lost motive power. There was no warning light illuminated. The vehicle was restarted; however, the failure recurred. The vehicle was taken to an independent mechanic, where it was diagnosed and determined that the rear fuel tank had failed and needed to be replaced. The vehicle was not repaired. The dealer was contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 65,580.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11717477February 12, 2026
ENGINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11716587February 8, 2026
ENGINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11716202February 6, 2026
POWER TRAIN
catastrophic engine failure to due connecting rod bearings spun on the crankshaft damaging the crank and sending bearing material throughout the oil galleries
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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