GMC Sierra Complaints

15,732 consumer complaints on file.

#11680187August 12, 2025
ENGINE, FUEL/PROPULSION SYSTEM
Truck is starting to feel/act different. There is shaking at acceleration and deceleration. Idling is starting to fluctuate more at stop. Hoping to get this in for inspection. Dealer cannot do so with incomplete recall note on the vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11680222August 12, 2025
FUEL/PROPULSION SYSTEM
My wife and I were traveling on a county road and without warning, the vehicle skipped twice and cut off in the middle of the roadway in a sharp curve with rain threatening at approximately 7:30 p.m. ET August 11, 2025. I attempted to restart numerous times because we were in the middle of the right lane. The starter would spin but vehicle would not restart. The truck then would not shut off and draining the battery. I called for a wrecker and the Sheriff's Office to keep somebody from hitting us. Before the wrecker came, we connected a diagnostic device to the vehicle indicating it was the fuel pump module.0August 12, 2-25, I called GM Roadside Assistance to be towed to closest dealership. The driver said he was familiar with a lot of GM trucks with the same issue. The vehicle has less than 12,000 miles and was purchased in June, 2024.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11680223August 12, 2025
ENGINE, ELECTRICAL SYSTEM
The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving at various speeds, the radio and other electrical systems failed to function as intended. The contact pulled over to the side of the road and turned off the vehicle. After several minutes, the contact restarted the vehicle and the radio and other electrical systems failed to engage. The contact was unsure if any warning lights were illuminated. The contact stated that on a separate occasion, while driving at various speeds, the check engine warning light illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not diagnosed or repaired. Upon further investigation, the contact became aware of a recall on the VIN. The contact parked the vehicle at the residence and no longer drove the vehicle. The contact asked the dealer to provide towing service to tow the vehicle and no response was provided. The manufacturer was not informed of the failure. The failure mileage was approximately 16,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11680238August 12, 2025
ENGINE
Check engine light came on for the first time. Engine started knocking, had loss in power, took it to the closest shop. Initial report was lifter failure, after taking apart the engine for lifter replacement they deduced the bad lifters also were accompanied by camshaft damage, and bad heads. Overall resulting in engine replacement being required. Again, first time the check engine light has come on.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11680272August 12, 2025
ENGINE, POWER TRAIN
I have a 2020 sierra 1500 6.2 with 86,000 miles. I have only had this truck 6 months. This was inspected before I purchased with no engine issues. Since purchasing we have driven less than 6000 miles. While driving my vehicle the rod in the engine failed and started knocking. I am a mechanic and I am GMC master certified. Both myself and the owner of the shop I work at diagnosed the vehicle with a bad engine. We looked at the recall for the 6.2 engine and noticed that many of the 2020 vehicles with this engine have the same issue that is currently being recalled for this specific engine. I called GMC and they won’t fix the issue that the vehicle is having. They won’t perform the recall and again I have only had this vehicle for 6 months and with 86,000 miles should not be having this issue. I am GMC certified and told them that I looked into the recall and they them selves state that some of the defective engines got out into the 2020 models.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679787August 11, 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 not yet available. The contact stated that while driving at various speeds, the engine made an abnormal sound. No warning lights were illuminated. The local dealer was contacted. 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 failure. The failure mileage was approximately 11,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679813August 11, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at various speeds, there was an abnormal banging sound coming from the vehicle. There was no warning light illuminated. The contact inspected fluids but found no defects with the vehicle. The vehicle was then taken to an independent mechanic, where the mechanic discovered that the lifters and cam shaft were defective. Due to the failure, the engine was replaced. The contact stated that recently, the abnormal tapping sound returned. The vehicle was taken back to the independent mechanic, who confirmed that the failure with the lifters had returned. The vehicle was taken to a dealer who confirmed the lifter failure, and the contact was provided an estimate for the repair. The manufacturer was notified of the failure, and the contact was provided a case number. The contact was then referred to the NHTSA to report the failure. The vehicle was not yet repaired. The failure mileage was approximately 90,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679851August 11, 2025
POWER TRAIN
The contact owns a 2020 GMC Sierra 2500. The contact stated that while driving approximately 70-80 MPH, the transmission downshifted, and the rear wheels locked up. The contact was able to coast to the side of the road. The contact was unsure if a warning light had illuminated. The vehicle was towed to the dealer, where it was diagnosed and determined that the transmission had failed and needed to be replaced. There were metal shavings found mixed in with the transmission fluid; however, the vehicle remained with the dealer unrepaired. The contact was informed by the dealer that the warranty had expired, and the vehicle could not be repaired. The manufacturer was notified of the failure but declined to assist in covering the cost of the repair. The failure mileage was approximately 166,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679909August 11, 2025
POWER TRAIN
Driving on highway at 70mph loss of power. Transmision slipping and vehicle rapidly lost speed creating a very hazardous situation. Was able to barley get of highway safely going down to 40mph. Vehicle went into limp mode.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679926August 11, 2025
ENGINE
I was notified by GMC of recall N25249000 by letter in May 2025. Shortly after I scheduled an appointment with my GM dealer to get the recall repaired but the dealer told me that GM has not told them how to repair the issue. The GM dealer told me they would let me know when GM tells the dealer how to repair the issue, so I could bring the vehicle back to repair the recall. I just received another notice from GMC about the recall today (08/11/2025). It has been roughly 4 months of waiting to get this recall fixed on my vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679630August 10, 2025
ENGINE
I have not had an incident yet. However GM itself has told us that the car has a high probability of having a major problem while driving and it has caused numerous injury related accidents. In fact, they will not let us trade the vehicle or sell the vehicle because the car is dangerous to drive. They also have no timeline on fixing the vehicle, which requires an engine replacement. This is also an environmental problem as the temporary mitigation of the problem (I say mitigation because it does NOT solve the problem) significantly changes the fuel efficiency of the vehicle. GM should be forced to let us trade the vehicle back with a solid valuation of our vehicle as if the problem did not exist. No solution short of putting a new engine in the vehicle or allowing us to trade the vehicle in immediately should be acceptable. NHTSA is aware of the problem but for some reason seems to be ignoring it. When VW had an engine problem, which was not a safety hazard, VW made it right. GM has no intention of doing anything about it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679714August 10, 2025
ENGINE
⸻ Background: •2021 GMC Sierra Denali – 6.2L V8 •VIN included in GM’s engine defect recall (connecting rod/crankshaft) •Recall status shows “No current remedy available” •Defect acknowledged by GM can cause “engine damage, loss of propulsion, or complete engine failure.” Timeline of Events: •~1 month ago – Truck began running rough with noticeable ticking/knocking noise. •Dealer could not schedule appointment for 3 weeks. •08/08/2025 – Dealer inspection confirmed failed lifters and damaged camshaft. •Repair estimate: $9,300 (see attached dealer estimate). Connection to Recall: •Lifter and camshaft are internal engine components dependent on the same lubrication and oiling system as the crankshaft/connecting rods cited in the recall defect. •The defect’s potential to contaminate oil and cause internal engine damage makes this failure consistent with recall-related damage.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679577August 9, 2025
POWER TRAIN
Transmission keeps shifting hard and stud stuttering at low speeds
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679286August 8, 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 not yet available. The contact was concerned that the failure could occur and that the parts were not yet available. The contact stated there was a lot of pressure and worry about what might happen should the failure occur. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the concerns. The contact had not experienced failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679292August 8, 2025
STRUCTURE:BODY
The upper portion of the front grille is loose and about to fall off. I know GMC has a recall on some trucks for this issue, however mine is not listed on this recall although I have the exact issue as the recalled trucks. It’s just a matter of time before this comes off driving 70 mph on the highway and could strike a vehicle behind me causing an accident. I noticed this being loose back in June 2025.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679302August 8, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2023 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 dealer was contacted. The manufacturer was made aware of the issue and confirmed that parts were not yet available. The contact had not experienced a failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679331August 8, 2025
ENGINE, POWER TRAIN, UNKNOWN OR OTHER
To whom this may concern, This gmc truck with the 6.2 has had constant engine issues regarding the lifters failure causing the engine to destroy itself internally I’ve had to get it repaired every 3 Months on average there’s also a class action lawsuit that applies only to the 2025-2020 years however they are the exact same engine in the 2017. The transmission is not in sync with the motor having a late take off or sounds like the gears are grinding between shifting
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679414August 8, 2025
STRUCTURE:BODY
GMC Sierra 1500 Front Upper Top Grille Molding Trim randomly flew off at highway speed. Hit the windshield and the vehicle behind me. No warning
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679446August 8, 2025
UNKNOWN OR OTHER
Driving down interstate highway and sunroof “exploded”. Raising glass sunroof up about 2” above the body. Vehicle had 387 miles on it. This occurred at about 6:55 am and outside temperature was about 74 degrees. The rupture was loud and very startling and I exited the interstate pulling over to see what occurred. There was no damage whatsoever to any other body component and no “flying” debris was observed at anytime that could have struck the vehicle. I requested GMC dealer to look at onboard cameras and save video but they seemed dismissive. Had the interior sunroof shade not been closed I would have been showered in glass while driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679451August 8, 2025
STRUCTURE:BODY
March 28, 2025: A recall (NHTSA Recall No. : 25V-060) service for the front upper grille deflector was performed. August 7, 2025: The front upper grille deflector flew off my truck while I was driving on the interstate, despite the recent recall service. The failure of a recall repair is particularly alarming and a serious safety hazard.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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