Consumer Safety Complaints

Incident date: Mar 20, 2025

My 2019 GMC SLT seems to be having sensor problems. I keep getting a message that my driver assist is reduced and my A/C only blows out hot air. It’s done this to me randomly id say about 4-5 times. It will go off as I’m driving and than my temp gauge goes to zero. I did research and alot of other users have the same issue and say thermostat or thermostat sensor. If I disconnect my negative ... Read more

Incident date: Apr 2, 2025

My SUV pulls hard to the right when braking at speeds above 50 mph and much more on the interstates at 65 mph and above. I first experienced this after three weeks of ownership on a drive up I-95 on a trip to NC. It has happened numerous times while traveling on the interstates and has almost caused loss of control when having to brake hard when cut off by another driver or traffic suddenly coming... Read more

Incident date: Apr 2, 2025

My SUV pulls hard to the right when braking at speeds above 50 mph and much more on the interstates at 65 mph and above. I first experienced this after three weeks of ownership on a drive up I-95 on a trip to NC. It has happened numerous times while traveling on the interstates and has almost caused loss of control when having to brake hard when cut off by another driver or traffic suddenly coming... Read more

Incident date: Apr 2, 2025

My SUV pulls hard to the right when braking at speeds above 50 mph and much more on the interstates at 65 mph and above. I first experienced this after three weeks of ownership on a drive up I-95 on a trip to NC. It has happened numerous times while traveling on the interstates and has almost caused loss of control when having to brake hard when cut off by another driver or traffic suddenly coming... Read more

Incident date: Mar 1, 2025

The contact owns a 2025 GMC Sierra 3500. The contact stated that the transmission was shifting hard and was jerking while shifting gear. Additionally, the vehicle failed to accelerate above 50 MPH. The messages “Reduced Acceleration” and “DEF Low” were displayed. While refueling the vehicle, the fuel gauge failed to correctly display the level of fuel inside the fuel tank until the vehicle... Read more

Incident date: Mar 1, 2025

The contact owns a 2025 GMC Sierra 3500. The contact stated that the transmission was shifting hard and was jerking while shifting gear. Additionally, the vehicle failed to accelerate above 50 MPH. The messages “Reduced Acceleration” and “DEF Low” were displayed. While refueling the vehicle, the fuel gauge failed to correctly display the level of fuel inside the fuel tank until the vehicle... Read more

Incident date: Mar 1, 2025

The contact owns a 2025 GMC Sierra 3500. The contact stated that the transmission was shifting hard and was jerking while shifting gear. Additionally, the vehicle failed to accelerate above 50 MPH. The messages “Reduced Acceleration” and “DEF Low” were displayed. While refueling the vehicle, the fuel gauge failed to correctly display the level of fuel inside the fuel tank until the vehicle... Read more

Incident date: Mar 15, 2026

What component or system failed or malfunctioned, and is it available for inspection upon request? The vehicle experienced a malfunction associated with a failed Over-The-Air (OTA) software update affecting electronic control modules. The (ECM), (BCM), and related electronic systems appeared to lose stability during operation. The vehicle attempted to reboot while being driven and displayed multip... Read more

Incident date: Mar 15, 2026

What component or system failed or malfunctioned, and is it available for inspection upon request? The vehicle experienced a malfunction associated with a failed Over-The-Air (OTA) software update affecting electronic control modules. The (ECM), (BCM), and related electronic systems appeared to lose stability during operation. The vehicle attempted to reboot while being driven and displayed multip... Read more

Incident date: Mar 15, 2026

What component or system failed or malfunctioned, and is it available for inspection upon request? The vehicle experienced a malfunction associated with a failed Over-The-Air (OTA) software update affecting electronic control modules. The (ECM), (BCM), and related electronic systems appeared to lose stability during operation. The vehicle attempted to reboot while being driven and displayed multip... Read more

Incident date: Mar 18, 2026

On 18 March 2026 I was driving at night at highway speed with my family (wife, [XXX] son, [XXX] daughter, and [XXX] son) when, without any warning, my 2023 GMC Sierra AT4 with 20,700 miles abruptly and violently shuddered and reduced speed from approximately 65 mph to 30 mph uncontrollably. Shortly after the initial speed reduction the vehicle presented simultaneous alerts that it was in "reduc... Read more

Incident date: Jan 1, 2023

The contact owns a 2021 GMC Sierra 2500. The contact stated that while driving at 55 MPH, the vehicle stalled unexpectedly. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed, and determined that the engine needed to be replaced. The engine was replaced; however, the failure recurred. While at a stop and attempting to drive around a curve, t... Read more

Incident date: Mar 21, 2026

-The engine in my 2021 GMC Denali 1500 with the 6.2L engine failed its second engine with ~4,000 miles on the new engine. It is currently at GMC dealer waiting for a 3rd new engine. - Fortunately i was parked when the failure happened and the engine locked up. -Dealer confirmed that a valve dropped and damaged the cylinder wall. - There were no warning lamps or other indication that a failure w... Read more

Incident date: Mar 31, 2026

There is a recall on the 6.2 motor that is in my truck at my last oil change they performed a pico scoop diagnostic on the truck said it passed and gave it the new type of oil and oil cap that was suppose to fix it. Now a couple months later I walk out start my truck to let it warm up and after starting all of a sudden the engine started nocking bad and loss of oil pressure and on dip stick. I l... Read more

Incident date: Feb 25, 2026

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 fai... Read more

Incident date: Feb 25, 2026

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 fai... Read more

Incident date: Mar 31, 2026

Park to shift issue - the vehicle did not register that I was in park, jerked hard when trying to place in gear, did not register the PROPER gear (reverse, neutral, drive), would NOT unlock doors to let passengers out even if it were an emergency. Seems to be triggered on inclines but have also been having issues on flat ground. Other Acadia's apparently have a recall for this issue but my VIN doe... Read more

Incident date: Mar 31, 2026

Park to shift issue - the vehicle did not register that I was in park, jerked hard when trying to place in gear, did not register the PROPER gear (reverse, neutral, drive), would NOT unlock doors to let passengers out even if it were an emergency. Seems to be triggered on inclines but have also been having issues on flat ground. Other Acadia's apparently have a recall for this issue but my VIN doe... Read more

Incident date: Mar 31, 2026

Park to shift issue - the vehicle did not register that I was in park, jerked hard when trying to place in gear, did not register the PROPER gear (reverse, neutral, drive), would NOT unlock doors to let passengers out even if it were an emergency. Seems to be triggered on inclines but have also been having issues on flat ground. Other Acadia's apparently have a recall for this issue but my VIN doe... Read more

Incident date: Mar 31, 2026

THE ENGINE COMPLETELY SHUTS OFF WHEN I STOP AT A STOP SIGN OR STOP LIGHT. I HAVE BEEN STUCK IN TRAFFIC INTERSECTIONS ON SEVERAL OCCASIONS UNABLE TO MOVE WHEN THE LIGHT TURNS GREEN. EVENTUALLY THIS WILL LEAD TO ME GETTING REAR ENDED AND PUSHED INTO IN THE MIDDLE OF AN INTERSECTION. MY LIFE IS IN DANGER WHEN I DRIVE THIS VEHICLE. I GOT MY ENGINE REPLACED AND STILL THE SAME ISSUE IS OCCURRING WITH TH... Read more

Incident date: Nov 15, 2024

I reported problems with my truck to Beck and Masten South GMC. I was put off a number of times with ridiculous excuses. My vehicle sat in the shop for a month to get my OnStar safety equipment repaired. I also had arguments with them regarding the oil light coming on and it burning excessive amounts of oil. I was told this was normal. I know better. Also, I needed to get it back into the shop for... Read more

Incident date: Nov 15, 2024

I reported problems with my truck to Beck and Masten South GMC. I was put off a number of times with ridiculous excuses. My vehicle sat in the shop for a month to get my OnStar safety equipment repaired. I also had arguments with them regarding the oil light coming on and it burning excessive amounts of oil. I was told this was normal. I know better. Also, I needed to get it back into the shop for... Read more

Incident date: Nov 15, 2024

I reported problems with my truck to Beck and Masten South GMC. I was put off a number of times with ridiculous excuses. My vehicle sat in the shop for a month to get my OnStar safety equipment repaired. I also had arguments with them regarding the oil light coming on and it burning excessive amounts of oil. I was told this was normal. I know better. Also, I needed to get it back into the shop for... Read more

Incident date: Jan 1, 2026

I believe the torque converter is failing. While driving approximately 38 mph and also 48 mph up to 51 mph the vehicle have a vibration feeling like driving on a rumble strip. If you maintain the same speed, the vibration continues if you speed up, slow down, or let off the gas it goes away. There are so many detailed explanations on forums and social media from other customers experiencing the sa... Read more

Incident date: Mar 31, 2026

I stopped at a stoplight and my truck shut off, the doors unlocked and then immediately restarted and then came up with a bunch of errors telling me that my brake system failed and to get the traction control serviced. I then had no power braking. This is the second time my truck has shut off at a light and restarted, but I don’t lose my brakes the first time.

Incident date: Mar 31, 2026

I stopped at a stoplight and my truck shut off, the doors unlocked and then immediately restarted and then came up with a bunch of errors telling me that my brake system failed and to get the traction control serviced. I then had no power braking. This is the second time my truck has shut off at a light and restarted, but I don’t lose my brakes the first time.

Incident date: Mar 31, 2026

when apply GM update V661.10. tire pressure sensors are wipe out. resulting in 4 flat tire being indicated on the display. GM has no answers for this. this is a safety system that should not be disabled

Incident date: Mar 22, 2026

Engine failed with just 3,633 miles. Covert GMC is replacing the entire engine.

Incident date: Mar 30, 2026

P1098 code coolant control valve fail service bulletin N252508341 my vin not covered but same motor and same part !

Incident date: Mar 23, 2026

I’ve owner the vehicle since new. My A/C condenser has failed 3 times, meaning I’m now about to be on my 4th. The welds are weak and it cracks in the same spot 95% of the time. It should last more than a 2 year average.

Incident date: Mar 15, 2026

The contact owns a 2023 GMC Acadia. The contact stated that while driving on the highway at an undisclosed speed, the vehicle stalled, and the engine lost automotive power. The vehicle was able to restart. During a second failure, the vehicle lost automotive power and stalled in the middle of the highway, and the vehicle was unable to restart. An alert message was sent by OnStar reporting a transm... Read more

Incident date: Mar 15, 2026

The contact owns a 2023 GMC Acadia. The contact stated that while driving on the highway at an undisclosed speed, the vehicle stalled, and the engine lost automotive power. The vehicle was able to restart. During a second failure, the vehicle lost automotive power and stalled in the middle of the highway, and the vehicle was unable to restart. An alert message was sent by OnStar reporting a transm... Read more

Incident date: Mar 27, 2026

The front upper grille broke off and detached at highway speeds. The grille impacted the hood, causing a scratch and dent and became a road hazard and has the potential to cause an accident. This is the same failure reported in NHTSA Campaign Number: 25V-060 that only covers 2022 model years. Research online indicates failures in 2022, 2023 and 2024 vehicles. GMC to date will not warranty or recal... Read more

Incident date: Mar 31, 2026

Electronic truck tail gate opened while driving after washing vehicle. The tailgate button on the FOB or inside the cabin were not pressed.

Incident date: Mar 31, 2026

Electronic truck tail gate opened while driving after washing vehicle. The tailgate button on the FOB or inside the cabin were not pressed.

Incident date: Mar 17, 2026

The contact owns a 2017 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, there was an abnormal tapping sound coming from the vehicle. The check engine warning light and an unknown warning light were illuminated. The contact stated that the failure had occurred while traveling out of state. The dealer was made aware of the failure, and the contact was informed that th... Read more

Incident date: Mar 17, 2026

The contact owns a 2017 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, there was an abnormal tapping sound coming from the vehicle. The check engine warning light and an unknown warning light were illuminated. The contact stated that the failure had occurred while traveling out of state. The dealer was made aware of the failure, and the contact was informed that th... Read more

Incident date: Mar 13, 2026

The panoramic sunroof on my 2023 GMC Yukon Denali Ultimate XL spontaneously exploded while driving westbound on I-20 on March 13. There was no impact from road debris, no vehicles ahead, no overpass, and no external cause. The failure sounded like an explosion or gunshot. Tempered glass shattered with the sunroof in the closed position, showering the interior with glass fragments. Five occupants w... Read more

Incident date: Mar 30, 2026

Months ago I took my car to the dealer for the engine failure recall and they said there were no issues and changed the oil to a higher viscosity oil. Today I was driving and my engine failed while turning onto a busy road and took multiple tries to get started. It finally started and the engine light was flashing. The dealer told me th flashing engine light was bad and to not drive at all. I pull... Read more

Incident date: Mar 5, 2026

While driving under normal conditions, a front grille trim component detached from my vehicle without any impact or external cause. The piece became airborne and struck my windshield, creating an immediate safety hazard and risk of loss of control. There was no prior damage or warning. This represents a failure of a vehicle component under normal operation and indicates a defect in materials, des... Read more

Incident date: Mar 27, 2026

On March 27, 2026, I experienced a complete brake failure while driving a 2021 GMC Acadia in a school zone at approximately 3:00 PM. When I pressed the brake pedal, the vehicle did not respond. I attempted multiple times, including using the emergency brake, which did not activate immediately. The vehicle remained in motion for several minutes in an area with children and parents present. The em... Read more

Incident date: Mar 27, 2026

On March 27, 2026, I experienced a complete brake failure while driving a 2021 GMC Acadia in a school zone at approximately 3:00 PM. When I pressed the brake pedal, the vehicle did not respond. I attempted multiple times, including using the emergency brake, which did not activate immediately. The vehicle remained in motion for several minutes in an area with children and parents present. The em... Read more

Incident date: Mar 30, 2026

The vehicle has a serious transmission/drivetrain defect that repeatedly occurs when accelerating from a complete stop, especially onto an incline. The vehicle sometimes does not respond at all when the accelerator is pressed and fails to move, even though acceleration is being requested. In one recent incident, it remained stopped for about one minute before finally responding. During these event... Read more

Incident date: Mar 30, 2026

The vehicle has a serious transmission/drivetrain defect that repeatedly occurs when accelerating from a complete stop, especially onto an incline. The vehicle sometimes does not respond at all when the accelerator is pressed and fails to move, even though acceleration is being requested. In one recent incident, it remained stopped for about one minute before finally responding. During these event... Read more

Incident date: Mar 30, 2026

The vehicle has a serious transmission/drivetrain defect that repeatedly occurs when accelerating from a complete stop, especially onto an incline. The vehicle sometimes does not respond at all when the accelerator is pressed and fails to move, even though acceleration is being requested. In one recent incident, it remained stopped for about one minute before finally responding. During these event... Read more

Incident date: Mar 14, 2026

Vehicle warning light, and noise alerts when placing in park. Vehicle does not register PARKED. Vehicle has to be restarted several times and shifter moved in and out of park until registers as parked. When viewed by mechanic, it was stated there has been a recall to contact manufacturer about recall, but none noted on site.

Incident date: Mar 27, 2026

Motor spun a bearing on the crank and the vehicle is needing a new motor. 73,000 miles. Passed the GM recall inspection less than 6 months ago. Vehicle has had regular oil changes and all maintenance done on time. Engine started hard then started knocking. Made it to dealership for diagnostics.

Incident date: Apr 21, 2023

Twice the side detection system failed due to corroded wiring under the bumper which then led into the electrical system failing on side air bag detection/blind zone detection/traction control system/display monitor and blinkers all failing to the point of vehicle not starting. The safety is these features failed which were both safety and stability. Risks occur in becoming stranded and the prob... Read more

Incident date: Apr 21, 2023

Twice the side detection system failed due to corroded wiring under the bumper which then led into the electrical system failing on side air bag detection/blind zone detection/traction control system/display monitor and blinkers all failing to the point of vehicle not starting. The safety is these features failed which were both safety and stability. Risks occur in becoming stranded and the prob... Read more

Incident date: Mar 22, 2026

The vehicle has the L87 GM engine. It lost complete power and the engine seized up and would not start again. Fortunately I was able to roll into a neighborhood and get off the main road with no issues. The dealer has confirmed the seized engine and a replacement engine has been ordered with no ETA. There was no prior warning of the failure, besides a shuddering, like I was running out of gas, and... Read more