GMC Sierra Complaints

15,732 consumer complaints on file.

#11660817May 14, 2025
ENGINE
So there is recall already for the engine but I’m not part of it which is weird cause my engine has been acting weird which I’m trying to take to dealer ship but they don’t want it due to I not being in the recall list. I have the engine 6.2 LTI have an 2021 GMC Sierra Denali
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660821May 14, 2025
ENGINE, POWER TRAIN
GM has discontinued a critical engine belt on the 2018 GMC Sierra 1500 5.3L eAssist. This makes the truck undrivable and unsafe to own, even though the vehicle is still under financing and only 7 years old. There is no available part, and no alternative has been offered by the manufacturer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660867May 14, 2025
VISIBILITY/WIPER
The passenger rear view mirror is completely flat, not concave like every other mirror we’re used to on a passenger vehicle. This mirror glass is only used on the passenger mirror of the EV trucks for some unknown reason. It is completely unsafe in such a large truck without huge blind spots. Because it appears to be zoomed you can completely miss cars otherwise viewable in blind spot. This also makes setting the passenger mirror up for towing very challenging and also dangerous. In addition the software for the backup titling mirrors works as designed for about 20 seconds and then while still backing moves the mirrors back to the normal position making backing a trailer for example dangerous.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660878May 14, 2025
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING, UNKNOWN OR OTHER
TWICE in the past month +. On [XXX] my wife and I were on our way to a family wedding and I was driving approx 75 MPH on [XXX]. I don't recall if I had cruise control on or not as I rarely use it. There was no vehicle was in front of me for hundreds of yards yet all of a sudden the vehicle started to brake very hard. I accelerated as I did not know what was going on and I had a car in back of me that started to gain. THEN last Friday ([XXX}) with my wife following me in her car on [XXX] through Ellicott City MD I was traveling at approx 25-30 MPH through a very small historic town when all of a sudden the same [XXX] thing happened. DEF no CC on . When we got to our destination I asked my wife if she saw my brakes come on suddenly?. She replied yes and said she saw the truck dip hard. I told her the brakes did it again. She said I should call the dealer. I did not as they are USELESS! THEN the electronics. On Star has a catalog of my complaints. The radio selections I make just disappear from the screen: Apple Car Play disappears from the touch screen and just goes dark. I have to stop the truck..(per on-star) open the door.. get out.. lock it.. wait 2 minutes.. get back in .. restart the truck, and this re-sets the computers(s). RIDICULOUS! I do not have Sirius but the radio goes dark often for about 2-3 seconds., then comes back on. I was told it is my I-Phone is causing this. [XXX]! What does my phone have to do with AM/FM radio?? I was told by GMC there is a patch to update the software. Koons GMC told me there was no such patch nor recall. I paid nearly $80,000 for this piece of [XXX]! 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
#11660879May 14, 2025
ENGINE AND ENGINE COOLING, ENGINE
The contact owns a 2020 GMC Sierra 1500. The contact stated while driving 5 MPH, the vehicle made an abnormal popping sound. The check engine and the ABS warning lights were illuminated. The messages "Parking Brake Service" and "ESC Service" were displayed. Additionally, the contact stated the vehicle experienced a reduced fuel range. The vehicle was taken to the dealer, where it was diagnosed that the lifters had fractured, causing damages to the engine. The dealer determined that the engine needed to be replaced, and the part was ordered. The vehicle was not repaired. The contact related the failure to NHTSA Action Number: PE25001 (Engine, Engine and Engine Cooling). The manufacturer was notified of the failure. The failure mileage was approximately 80,100.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660907May 14, 2025
ENGINE
The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving on the highway at 55 MPH, the vehicle lost automotive power and the steering wheel became stiff. The contact stated that the vehicle decelerated to 20 MPH, with several unknown warning lights were illuminated. The vehicle was taken to an independent mechanic where it was diagnosed, and the contact was informed that the engine had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 101,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660921May 14, 2025
FUEL/PROPULSION SYSTEM, ENGINE
My 2016 GMC Sierra 2500 with a 6.6-liter Duramax diesel V8 engine suffered a complete engine shutdown—an issue that is both hazardous and expensive to repair. Fortunately, mine failed in a parking lot. No warning lights or symptoms were present. Failure is instantaneous and can occur any time rendering the vehicle inoperable on high-speed highways, Intersections, etc. Failure always leaves vehicle occupants stranded, creating an unsafe and dangerous situation. My vehicle was towed to a GMC dealer. Repair costs could be as high as $15,000. The 6.6-liter Duramax diesel V8 engine is equipped with a Bosch ‘CP4’ high-pressure fuel pump. These pumps are unreasonably fragile and prone to catastrophic failure causing instant contamination of the entire fuel system with metal shavings. General Motors has agreed to pay $35 million to settle with owners following a class action lawsuit that accused the company of installing defective Bosch CP4 high-pressure fuel pumps in certain Chevrolet and GMC pickup models. This action covered only owners in California, Florida, Illinois, Iowa, New York, Pennsylvania, or Texas.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660946May 14, 2025
ENGINE
Coolant bypass valve went out. The safety was questionable as the truck reduced speed rapidly makes the cars behind at risk. The problem is constant because my truck is not the only one in the shop for it. Only the dealership has inspected the truck. I bought my truck used so not sure if it appeared before I bought it but I only had my truck a week before it was in the shop. Waning lights came on and would only go off with a code reader/clearer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660582May 13, 2025
UNKNOWN OR OTHER
Tailgate unlatches unexpectedly. Has happened while parked and while driving. Almost caused accident to others.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660647May 13, 2025
ENGINE
Engine failed. We had just passed a semi truck when the engine lost all power. Problem was confirmed by Hart Motors (the delearship the pickup was purchased from). Vehicle was inspected by the dealership. No warnig lights or any symptoms pior to the engine failing.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660660May 13, 2025
ENGINE
Engine failed. Driving on the interstate and vehicle lost all power. Problem confirmed by Jim Glover Cheverolet. Engine inspected and confirmed by dealership. No warning at all.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660664May 13, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2024 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. The VIN was not available. VIN tool confirms parts not available.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660672May 13, 2025
ELECTRICAL SYSTEM, FORWARD COLLISION AVOIDANCE: WARNINGS, LANE DEPARTURE: WARNING
Intermittent failure of audio and safety alerts (Forward Collision Alert, Lane Departure Warning) Dealership’s response: “No fix” despite warranty. Safety impact: Increased collision risk.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660705May 13, 2025
ENGINE
I am writing to formally document an ongoing and serious issue with our 2019 GMC Sierra 1500 (VIN: [XXX] ), which I strongly believe may be related to the current GM recall involving L87 V8 engines—despite my vehicle not yet being included. Early last year, our family experienced a sudden and frightening loss of power while driving at full speed on a curve, with our children and their car seats secured in the back. The vehicle lost power abruptly, accompanied by a loud ticking noise from the engine. This incident could have easily led to a serious accident and was terrifying for all of us. Since that time, the truck has spent more than half the year in and out of repair shops. The initial repair estimate was nearly $20,000—unmanageable for us, especially since the vehicle is paid off. Fortunately, a family friend was able to repair it for significantly less, but the problems have persisted. Most recently, the check engine light returned and we experienced another episode of reduced power, suggesting an unresolved or recurring failure likely tied to internal engine components such as the long block, crankshaft, connecting rods, timing chain, or camshaft. This truck is essential for our family’s daily life—including commuting to work and school, and especially out-of-town travel. Our other vehicle, a 2007 Honda Accord, is much smaller and insufficient for our growing family. This ongoing issue has caused substantial disruption, stress, and financial strain. It has also delayed our ability to upgrade to a larger family vehicle, something we had planned and budgeted for before this ordeal. Given the severity and duration of the issue—and its apparent connection to the same engine problems affecting newer models—we want to ensure this situation is documented with the NHTSA and GM. We sincerely hope that the scope of the current recall will be expanded, and that appropriate relief or support will be offered to affected vehicle owners like us. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660712May 13, 2025
POWER TRAIN
The contact owns a 2024 GMC Sierra 3500. The contact stated that while driving on the highway at 50 MPH, the vehicle lost automotive power and failed to exceed 50 MPH. The contact stated that the check engine warning light was illuminated. The vehicle was taken to a local dealer where the vehicle was diagnosed, and the contact was informed that the transmission valve body was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 36,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660806May 13, 2025
UNKNOWN OR OTHER
Safety Concern Report: 2024 GMC Sierra Gear Shifter Obstruction ⸻ Vehicle Information: 2024 GMC Sierra [Specify 1500/2500/3500] [Optional: VIN Number] ⸻ Description of the Problem: I am writing to report a design concern with my 2024 GMC Sierra. The location and height of the gear shifter on this vehicle significantly obstruct the driver’s view of the center infotainment screen and console, especially while seated in a normal, upright driving position. The gear shifter blocks important information such as navigation directions, ETA, media controls, and other on-screen notifications. This forces me to lean forward or reposition myself in an unnatural way while driving, which I believe creates an unnecessary distraction and increases the risk of driver error or loss of situational awareness. I have attempted to adjust my seating position, steering wheel angle, and seat height, but none of these adjustments fully resolve the obstruction. After discussing this issue with other owners online, I found that multiple GMC Sierra owners have experienced the same visibility problem. Some have even resorted to aftermarket modifications to address the design flaw. I believe this is a design oversight that affects safe vehicle operation. I respectfully request that GMC and the National Highway Traffic Safety Administration review this issue for potential corrective action. ⸻ Requested Action: Please investigate this safety concern and consider potential solutions, such as a recall, design revision, or retrofit option to improve screen visibility without forcing the driver into unsafe driving postures. Thank you for your attention to this matter.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660333May 12, 2025
UNKNOWN OR OTHER
There is a known issue with these trucks with the infotainment screen blacking out, which renders the backup cameras inoperative. This is a huge safety risk and its astounding to me that this hasn't been recalled yet.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660430May 12, 2025
STRUCTURE:BODY
The chrome front grill deflector is loose and feels like it is going to fly off at any moment. There have not been any accident or collision with the vehicle for this to be my fault. I know all the 2022 GMC Sierras got recalled for this issue but dealership said my vehicle isn’t covered even though is the same issue
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660438May 12, 2025
POWER TRAIN
Truck has 8L90 transmission, has recently started shuddering at speeds from 65-75 and higher, I am experiencing issues with occasional hard shifts from 1st to 2nd gear, and 2 days ago experienced a very hard shift around 30-40mph when it slammed it made the tires chirp. 85k miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11660454May 12, 2025
UNKNOWN OR OTHER, VISIBILITY/WIPER
Windshield issues. Small debris creates significant chips and cracks on windshield. In 30 years of owning vehicles I have never had a chip. Had this vehicle one year and 3 significant cracks and three chips. Anything that hits the windshield does damage. Very dangerous issue that needs addressed. A windshield is a safety issue and one that cracks so easily is completely unsafe!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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