GMC Sierra Complaints

15,732 consumer complaints on file.

#11736455May 8, 2026
STRUCTURE:BODY
I had the recall performed to reinforce the upper grille deflector on my truck because there was risk of it flying off at highway speeds. Last week driving down the highway my grille deflector flew off and had the car behind me not swerved, they would have been struck by it. I have an appointment at my dealership tomorrow.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736469May 8, 2026
ELECTRICAL SYSTEM
During normal use, the factory wireless phone charging pad in the center console overheated, produced visible smoke inside the cabin, and melted the charging surface area. No liquids or foreign metal objects were present. The phone was placed normally on the charging pad. The incident created a burning smell and visible damage to the interior trim. The system did not shut down before damage occurred. This appears to be a potential electrical or thermal safety failure in the factory-installed wireless charging system.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736546May 8, 2026
WHEELS, ENGINE, POWER TRAIN
I have had an incident where my 2023 gmc 3500 hd was had left me stranded earler this week. i towed the new truck to a certified dealer and i haven't heard anything since then. they mentioned my transmission will need to be fully replaced because valve body issues of solenoid a,e,f, are stuck open and closed codes on the 10 speed transmission upon researching my trucks history it was manufactured in 2022 and pulled out for sale october 2022 and i have seen. 242454441 special recall the same issues i experienced shudder and engine power reduced and no parking gear or driving. i need help and didnt have any warning of anything about this till now since it was showing my vehicle only had a tailgate issue which gmc didnt help me out when i had to pay for my taillight after firewood flew out with the tailgate opening in jan 2023 they said it wasnt a known issue then fixed the tailgate but not the taillight so i need help proving my truck belongs with the 242454441 class of recalls because not only does the transmission the exact same as previous models obviously 1000s of others are getting this issue thank you
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11736591May 8, 2026
ENGINE
The 2019 vehicle experienced a significant engine failure consistent with widely reported issues involving GM 6.2L V8 engines in GMC Sierra and Chevrolet Silverado platforms. Prior to failure, the vehicle developed abnormal engine noise including ticking/knocking sounds, followed by loss of engine performance and mechanical failure. Vehicle diagnosis indicated internal engine damage requiring major repair or full engine replacement. The failure occurred despite normal maintenance and relatively low mileage for a modern full-size truck. The vehicle had no prior abuse, modification, or racing use. Based on technician feedback from December 2025 service call and publicly reported incidents, the failure appears consistent with commonly reported GM 6.2L issues involving: connecting rod bearing failure crankshaft/bottom-end damage lifter or valvetrain failure internal metal contamination sudden engine seizure or loss of propulsion This issue presents a serious safety concern because sudden engine failure can occur during normal roadway operation, potentially resulting in: sudden loss of power inability to accelerate vehicle shutdown while driving increased crash risk in traffic conditions I am aware of numerous similar complaints involving GM 6.2L V8 engines across multiple model years, including investigations and recalls affecting related vehicles and powertrains. My vehicle appears to exhibit the same or substantially similar failure characteristics. I request that NHTSA continue investigation into 2019 model-year GMC Sierra 6.2L engine failures and evaluate whether these earlier vehicles should be included in broader recall or warranty coverage.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736599May 8, 2026
LATCHES/LOCKS/LINKAGES
The contact owns a 2022 GMC Sierra LD Crew SLT. The contact stated that the vehicle's front driver side and passenger side doors do not lock when depressing the key fob and while inside the vehicle. The dealer was contacted; however the vehicle was not diagnosed or repaired. The manufacturer was not notified of the issue. The approximate failure mileage was 68,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736670May 8, 2026
ENGINE, VEHICLE SPEED CONTROL, FUEL/PROPULSION SYSTEM
I passed the recall inspection on 12/17/2025 and the higher viscosity oil was put into my vehicle. On 12/25/2025 my vehicle's engine shut off while I was traveling on the highway (I-25). The vehicle went into to neutral and I had to pull over to the side of the highway without power. The vehicle started again and as I was merging onto the highway it shut down again. The truck started again and I was able to drive it home. There were no codes found when I took it in for service on 12/26/2025. On 01/24/2026 I was driving on the highway (US-40) and I had complete engine failure. I had to get my vehicle towed to the service center and a new motor was installed. On March 27th the vehicle's engine shut off again while driving on the highway (US-191). There were no codes or check engine lights on this time either. The service records state that the starter mount stud was loose.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736362May 7, 2026
POWER TRAIN
The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving downhill, the vehicle failed to accelerate as intended while depressing the accelerator pedal. In addition, the vehicle felt as if it were in neutral. The tachometer gauge revved up independently. No warning lights were illuminated. The contact pulled to the side of the road. The contact opened the front hood and noticed that one of the transmission lines had failed. The vehicle was towed to the residence. The contact replaced the hose and filled up the transmission reservoir. The contact stated that the failure persisted. The vehicle was taken to a specialty transmission place and rebuilt the transmission. The vehicle was repaired. The contact stated that a few months later the failure persisted. The vehicle was towed to the specialty shop, and the transmission was replaced. The contact stated that a few months later, while driving at an undisclosed speed, an abnormal odor was emitting from the front end of the vehicle. The contact was able to pull to a rest area, and when the front hood was open, the contact noticed that one of the transmission lines had a leak and transmission oil was being sprayed all over. The contact was able to replace the transmission hose. The manufacturer was not made aware of the failure. The failure mileage was unknown.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736414May 7, 2026
ENGINE
I have the same model and year for GMC as bulletin 25NA-185, Engine Coolant Control Valve Failures on 3.0L Duramax (Dec 4, 2025), and am experiencing the same exact issue. Apparently my VIN is not included and I can't get an answer from GMC or the local dealer why it's not covered or how to have it reviewed to be added.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736238May 7, 2026
ENGINE, POWER TRAIN
The contact owns a 2022 GMC Sierra Denali 1500. The contact stated that while driving at 73 MPH the vehicle lost motive power. The contact was able to pull over safely. The driver was unaware of any warning lights being illuminated. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not notified. The failure mileage was unknown. The VIN was not available.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736245May 7, 2026
ENGINE
The contact owns a 2024 GMC Sierra. The contact stated while driving at an undisclosed speed, the low oil warning light illuminated. The contact stated that every 2,300 miles, the oil reservoir was refilled with 2 quarts of oil. In addition, the contact stated the failure occurred after the first oil change was performed. The vehicle was taken to the dealer, the contact was informed that the oil usage was normal. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 5,122.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736251May 7, 2026
ENGINE
Complete engine failure with 62,500 miles. Truck appears to have the same problem as the 21-2024 which is currently recalled and engines are being exchanged.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736307May 7, 2026
ENGINE
I own a 2019 GMC Sierra 1500 Denali equipped with the 6.2L L87 engine. On or around December 31, 2025, the vehicle developed a loud knocking noise from the engine that became worse with RPM increase. The truck was taken to a GMC dealership for diagnosis and repair under warranty/service contract coverage. The dealership initially diagnosed valvetrain-related failure and replaced multiple top-end components including lifters, rocker arms, camshaft-related parts, belts, pulleys, hoses, and associated hardware. After reassembly, the engine reportedly started briefly and then failed again. The dealership then performed additional teardown and determined the lower end of the engine had also failed. I was informed by dealership staff that rod bearing failure is “very common” on the L87 6.2L engines. Due to the extent of the damage, the vehicle ultimately required a complete long block replacement. My truck remained out of service from approximately 12/31/2025 until 5/1/2026, a period of roughly four months. During that time, there were repeated delays involving diagnosis, inspections, warranty approvals, and additional teardown procedures. The vehicle had approximately 111,858 miles at the time of failure and had been regularly maintained. Prior to the engine failure, the truck exhibited abnormal engine ticking/knocking noises under load and higher RPM operation. The final repair performed was replacement of the engine long block assembly. I am submitting this report because the dealership indicated this type of lower-end/rod bearing failure is common on the GM 6.2L L87 platform, and I believe this issue may represent a broader reliability and safety concern affecting other owners.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736314May 7, 2026
UNKNOWN OR OTHER
Telematics (OnStar) Module Dealership has checked it, the telmatic module is bad. And the dealership i went to Dossit big 4 in Tupelo MS told me this has been a problem with this truck. And are wanting me to pay $645 to fix it. After they just did some recalls and updated the software. This was working before then.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11736021May 6, 2026
ENGINE
On April 1, 2026 at approximately 7pm the vehicle had a complete engine failure exiting an interstate. As I was slowing to exit the interstate the truck, without warning, lost power and locked up the rear wheels. I was able to safely exit onto the off ramp, but did partially block the off ramp for 45 minutes waiting on a tow truck. Once I came to a complete stop the dashboard began displaying numerous error codes, included "key missing, restart truck and shift to park, and start failure". The vehicle was part of the GM L87 engine recall but had previously passed the PICO test and was deemed OK to drive. I had the vehicle towed to the closest GMC dealership where it was diagnosed as an engine failure and the engine was locked up. The vehicle has been at the GMC dealership since the night of April 1, 2026 with no date given as to when it will be fixed. The vehicle had displayed no signs of any problems prior to the engine failure on April 1, 2026.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735750May 5, 2026
ENGINE
GM 6.2L L87 was recalled. I took the truck in at 32,000 miles. GM dealer perfromed a Pico Test, motor failed. Motor replaced with "NEW" crate motor. I was without a truck or loaner for 3 weeks. Dealer called me when new motor was almost complete. First they said it would be a couple more days because they started the "NEW" motor and it had no oil pressure. They contacted GM Tec and they tested it again, it tested with too-high of oil pressure. GM then instructed them to replace the oil pump on the "NEW" Motor. I got the truck back a week later after being in the shop 3 weeks. I drove a total of 1,200 miles, 400 miles we're highway in one long trip. The balance was local. I went to start the truck one morning after it sat all weekend and the "NEW" motor was knocking like an old diesel. I video'ed it and sent to my service advisior, I was advised to bring it back again. Vehicle has been at dealer now 9 days, dealer took oil sample from "NEW" motor, it was found to have metallic matter in the oil. They contacted GM Tec again, it took GM Tec 3 days to respond, Last Friday GM Tec said pull the oil pan and take pictures. As of the typing of this email I have no loaner because there's a wait list for loaners, GM will only reimburse me $25/day for a rental and a truck rental is $105/day which I refuse to pay for GM's defects out of my pocket.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735786May 5, 2026
ENGINE
Coolant control valve not working correctly exhaust fan on high all the time but is never overheating this has been going on for a week it shows there is a 150000 mile warranty on it but not for mine
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735797May 5, 2026
ENGINE
6.2 ENGINE BLEW UP 3000 MILES
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735839May 5, 2026
ELECTRICAL SYSTEM, UNKNOWN OR OTHER
My 2022 GMC Sierra 2500HD was previously repaired under GM safety recall N232426400 / NHTSA recall 24V060 for the power-unlatching tailgate switch, which can fail from water intrusion. The recall repair was completed and the recall now shows as closed. Recently, the same tailgate switch problem occurred again. The dealer diagnosed water intrusion/corrosion affecting the tailgate release switch circuit, including damage to the related wiring harness/connector. GMC customer assistance stated they could not assist because the recall is closed. I am reporting this as a possible failed or inadequate recall remedy. The same water-intrusion condition addressed by the recall appears to have recurred after the recall repair, and the vehicle now requires additional repair to the same tailgate release system. This raises concern that the recalled safety defect was not fully remedied and that other vehicles may experience repeat failures after the recall is marked complete.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735894May 5, 2026
POWER TRAIN
Coolant control valve has failed and caused the check engine light to occur is available for inspection. Could cause the car to overheat and cause harm to myself or others Yes has been confirmed by dealer No GM has a special coverage out for the specific vehicle and model years for this vehicle, but are stating that my vehicle does not pertain to that coverage.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735431May 4, 2026
ENGINE
Start engine light came on while driving. The truck did a dead stop in the middle of the road. Tried to restart but nothing. A tow truck was called and the truck was dropped off at the local GMC dealer. The next day the dealer called me and told me I need a new engine.39,000 miles
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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