Showing 64,800 complaints for GMC
Incident date: Aug 16, 2026
I am filing a safety complaint regarding my 2021 GMC Yukon. While driving on the highway during a long-distance trip from [XXX] to [XXX], my vehicle suddenly experienced a serious loss of power, drivability issues, and loss of propulsion. The vehicle began shaking violently, slowing down unexpectedly, and struggling to maintain speed while in active highway traffic at highway speeds. At the time
... of the incident, the vehicle displayed a warning message indicating “Conditions Not Correct for Shift” at approximately 127,506 miles. Shortly after, the vehicle set diagnostic trouble code P0011, which relates to the engine and transmission system not performing as expected and indicates an issue with the Variable Valve Timing (VVT) system affecting engine timing and performance. The vehicle also entered a reduced performance state, and I was advised through the vehicle’s warning system to reduce speed, avoid hard acceleration, and avoid heavy load conditions. Despite following these precautions, the vehicle continued to run poorly and became increasingly unsafe to operate in highway traffic. This created a serious and potentially life-threatening situation, as I was traveling in fast-moving traffic and the vehicle lost normal propulsion and stability. I had to carefully maneuver out of active traffic lanes to avoid a potential collision. The vehicle eventually required roadside assistance/towing due to its inability to operate normally. Diagnostic trouble codes and warning messages were present at the time of failure. After the incident, I checked my VIN through the NHTSA recall system and discovered that my vehicle has three unrepaired safety recalls. Of particular concern is: NHTSA Recall Number: 25V274 GM Manufacturer Recall Number: N252494000 This recall involves certain GM vehicles equipped with the 6.2L V8 L87 engine and describes a manufacturing defect in the connecting rod and/or crankshaft components that may result in engine damag INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA),Read more
Incident date: Aug 16, 2026
I am filing a safety complaint regarding my 2021 GMC Yukon. While driving on the highway during a long-distance trip from [XXX] to [XXX], my vehicle suddenly experienced a serious loss of power, drivability issues, and loss of propulsion. The vehicle began shaking violently, slowing down unexpectedly, and struggling to maintain speed while in active highway traffic at highway speeds. At the time
... of the incident, the vehicle displayed a warning message indicating “Conditions Not Correct for Shift” at approximately 127,506 miles. Shortly after, the vehicle set diagnostic trouble code P0011, which relates to the engine and transmission system not performing as expected and indicates an issue with the Variable Valve Timing (VVT) system affecting engine timing and performance. The vehicle also entered a reduced performance state, and I was advised through the vehicle’s warning system to reduce speed, avoid hard acceleration, and avoid heavy load conditions. Despite following these precautions, the vehicle continued to run poorly and became increasingly unsafe to operate in highway traffic. This created a serious and potentially life-threatening situation, as I was traveling in fast-moving traffic and the vehicle lost normal propulsion and stability. I had to carefully maneuver out of active traffic lanes to avoid a potential collision. The vehicle eventually required roadside assistance/towing due to its inability to operate normally. Diagnostic trouble codes and warning messages were present at the time of failure. After the incident, I checked my VIN through the NHTSA recall system and discovered that my vehicle has three unrepaired safety recalls. Of particular concern is: NHTSA Recall Number: 25V274 GM Manufacturer Recall Number: N252494000 This recall involves certain GM vehicles equipped with the 6.2L V8 L87 engine and describes a manufacturing defect in the connecting rod and/or crankshaft components that may result in engine damag INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA),Read more
Incident date: Aug 14, 2026
The contact owns a 2019 GMC Acadia. The contact stated that while driving at an undisclosed speed, the engine seized, with several unknown warning lights illuminated. Additionally, the battery low and steering assist warning lights were illuminated. The contact's minor children were occupants in the vehicle during the failure. The tow truck assistant arrived. The tow truck driver assisted with res
... tarting the vehicle. The contact was able to restart the vehicle. The vehicle was taken to Firestone; however, the failure was not duplicated. The contact stated that a portable diagnostic tester was attached, but no error codes were displayed. The failure reoccurred. The vehicle was taken back to Firestone, where it was diagnosed with a failed START/STOP module. The contact was informed about Technical Service Bulletin: 21-NA-139. The manufacturer was made aware of the failure but provided no assistance. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 81,126.Read more
Incident date: Jun 15, 2026
The contact owns a 2008 GMC Sierra 1500. The contact stated that while driving 5 MPH with her husband and grandson inside the vehicle and entering the driveway at the residence, there was an abnormally loud explosion coming from inside the vehicle and the driver’s side seat belt tightened unexpectedly. The contact was able to park the vehicle. The contact sustained bruising to the chest. The con
... tact looked at her husband and became aware that the passenger’s side seat belt had tightened and there was blood dripping on the left side of the face, and her grandson had a bruise on the inner thigh. The contact took her husband to the Emergency Room for several fractured ribs. The contact’s grandson smelled an abnormal burning odor and became aware that the front passenger’s side seat belt was smoking. There was no warning light illuminated. The vehicle was towed to the dealer to a dealer to be diagnosed. The vehicle was diagnosed with a seat belt pre-tensioner failure. The contact was informed that the seat belt pre-tensioner needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and opened a case. The failure mileage was 208,809.Read more
3 injured
Incident date: Sep 10, 2025
The engine shuts off while slowing down. It cuts off cleanly and the entire dash lights up and the transmission shifts to neutral. The driver display says to put the truck in park and hit the start button. After you do this the truck runs fine for about 2k-3k miles and does it again. I has done this 5 times within 10k miles. The dealer says nothing is wrong with the truck because the computer
... doesn't record any codes. This happens regardless of whether the auto stop/start feature is on or off.Read more
Incident date: Jun 29, 2026
Engine seized on June29th while driving on I 64 . (6.2 L87) due to oil line failure. Engine replaced on July 18th, 2026. New engine started leaking oil from camshaft and gasket on August 10th 2026, back in GMC Shop on August12th 2026 for repairs, still waiting parts today. Sudden failure on road in traffic Inspected by GMC Southpoint. No indication prior to failure and shut down completely. Could
... not do anything to move vehicle out the road.Read more
Incident date: Jul 1, 2026
Gas fill door won’t stay closed
Incident date: Aug 15, 2026
The molding cover for the hood fell off by Hwy speed, and recently we I went to oil change after I get the car the technician said the bolt for tie the oil thing is not correct and it’s not for this car and this was the reason for leaking and need to replace with right one.
Incident date: Aug 15, 2026
The molding cover for the hood fell off by Hwy speed, and recently we I went to oil change after I get the car the technician said the bolt for tie the oil thing is not correct and it’s not for this car and this was the reason for leaking and need to replace with right one.
Incident date: Aug 15, 2026
I was driving north/east on [XXX] just outside of [XXX]. After accelerating to give another driver room to move out of his lane that was ending, I lost propulsion/power. The Sierra went into Neutral and told me something like "Press Start to resume". I had to immediately get off the interstate as I was rapidly losing speed. I was able to pull over to the shoulder of the interstate on the right
... , just before exit 2. After getting the vehicle parked, I was never able to restart the vehicle. The motor would not turn over. The display screens kept cycling between a blank display and a display that looked like the vehicle was on but the engine never turned on. When I tried to start the car, I got a message of "conditions not correct for shift". We could not even get the vehicle into Neutral. I used OnStar to get State Patrol to show up and put lights behind us for safety. OnStar should have a recording of this call. This was on Saturday XXX in the ballpark of 2:30 pm central time. I would imagine the officer also filed a report, but I did not get it. The vehicle was towed to Billion GMC in Iowa City. Billion GMC said their initial suspicion is the 6.2L motor failed / locked up on us as this is know issue that is subject of a class action lawsuit. These vehicles ARE NOT SAFE to be on the highway, someone is going to get seriously injured, please do everything you can to get these 6.2L engines off the road before someone dies. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)Read more
Incident date: Aug 15, 2026
I was driving north/east on [XXX] just outside of [XXX]. After accelerating to give another driver room to move out of his lane that was ending, I lost propulsion/power. The Sierra went into Neutral and told me something like "Press Start to resume". I had to immediately get off the interstate as I was rapidly losing speed. I was able to pull over to the shoulder of the interstate on the right
... , just before exit 2. After getting the vehicle parked, I was never able to restart the vehicle. The motor would not turn over. The display screens kept cycling between a blank display and a display that looked like the vehicle was on but the engine never turned on. When I tried to start the car, I got a message of "conditions not correct for shift". We could not even get the vehicle into Neutral. I used OnStar to get State Patrol to show up and put lights behind us for safety. OnStar should have a recording of this call. This was on Saturday XXX in the ballpark of 2:30 pm central time. I would imagine the officer also filed a report, but I did not get it. The vehicle was towed to Billion GMC in Iowa City. Billion GMC said their initial suspicion is the 6.2L motor failed / locked up on us as this is know issue that is subject of a class action lawsuit. These vehicles ARE NOT SAFE to be on the highway, someone is going to get seriously injured, please do everything you can to get these 6.2L engines off the road before someone dies. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)Read more
Incident date: Jun 18, 2026
Sudden catastrophic engine failure occurred at 7400 miles, 2026 GMC Sierra1500 Denali with 6.2L engine. Driver and 3 children in vehicle headed to school when engine suddenly failed while driving on the roadway. No warning or vehicle symptoms prior. We were told the truck needs a total engine replacement- on a brand new vehicle. It has been nearly 9 weeks with no resolution or repair from GM.
... The truck was towed to the GM dealership it was purchased from on June 18th and it remains sitting in their service department lot with no timeline for repair or replacement.Read more
Incident date: Aug 7, 2026
Sunroof shattered driving on the interstate. Never saw a rock or anything. I think it shattered due to pressure and temperature changes.
Incident date: Aug 15, 2026
Since we purchased our 2022 Acadia 6/24/2022 we have had the warning "Service Safety Restraint System" pop up randomly. We have mentioned it numerous times over the years when the vehicle has been in for routine service at our local dealership. They have never been able to determine the cause as no service code ever shows up for them. Today in addition to the warning the red air bag warning ligh
... t also lit up briefly. The warning has popped up 2x in the last 2 weeks again with today being the only time we noticed the red light as well. We are now more concerned about the safety of our vehicle. (We will be on vacation now through 8/25 & would be available after that date for any contact)Read more
Incident date: Aug 15, 2026
Since we purchased our 2022 Acadia 6/24/2022 we have had the warning "Service Safety Restraint System" pop up randomly. We have mentioned it numerous times over the years when the vehicle has been in for routine service at our local dealership. They have never been able to determine the cause as no service code ever shows up for them. Today in addition to the warning the red air bag warning ligh
... t also lit up briefly. The warning has popped up 2x in the last 2 weeks again with today being the only time we noticed the red light as well. We are now more concerned about the safety of our vehicle. (We will be on vacation now through 8/25 & would be available after that date for any contact)Read more
Incident date: Feb 1, 2025
Unknown Truck engine will cut off in the middle of high speed traffic. More than three times.
Incident date: Feb 1, 2025
Unknown Truck engine will cut off in the middle of high speed traffic. More than three times.
Incident date: Feb 1, 2025
Unknown Truck engine will cut off in the middle of high speed traffic. More than three times.
Incident date: Aug 11, 2026
Our lifters in cylinder 3 were replaced after failing at 40,000 miles. The exact same lifters broke again at 77,000 miles.both events caused engine failure.
Incident date: Aug 11, 2026
Our lifters in cylinder 3 were replaced after failing at 40,000 miles. The exact same lifters broke again at 77,000 miles.both events caused engine failure.
Incident date: Aug 11, 2026
Our lifters in cylinder 3 were replaced after failing at 40,000 miles. The exact same lifters broke again at 77,000 miles.both events caused engine failure.
Incident date: Jul 4, 2026
While traveling with my wife and two toddlers over the July 4th holiday weekend, the 12 volt battery on my 2025 GMC Hummer EV failed completely at approximately 7,500 miles and five months of ownership. The vehicle would not accept a jump start and was disabled where it sat, stranding my family. AAA installed a replacement 12 volt battery roadside at a cost of $600. Following the battery replacem
... ent, a Service High Voltage System warning appeared on the dash and remained on, and the air conditioning system stopped functioning entirely. This occurred in Southern California summer heat with two small children in the vehicle. The HVAC loss and the high voltage system warning persisted for weeks. I brought the vehicle to a GMC dealership on July 15, 2026, repair order 978148, reporting the high voltage warning, the inoperative AC, and the battery failure. The dealership held the vehicle 7 days and performed no diagnosis. On July 26 I performed a 12 volt battery disconnect and reset myself, after which the warning cleared and the AC returned. No root cause has ever been diagnosed. The condition may recur. I am filing this because a sudden 12 volt system failure on this platform disables the entire vehicle, including a no-jump condition, and in my case produced a high voltage system warning and total HVAC loss. A 12 volt failure that strands a vehicle in traffic or disables climate control in extreme heat with children aboard is a safety issue, and NHTSA's complaint database already contains other electrical system complaints on this model year. The root cause of my failure remains undiagnosed by GM or its dealer.Read more
Incident date: Aug 14, 2026
SUV shut down when I was driving with no warning. OBD reader Code P129F Fuel pump power control Module is bad GM has recall #N252516900 lists my year and make of my SUV but my VIN# is not included and GMC said that it will not covered because the vin is not on the list.
Incident date: Aug 7, 2026
The contact owns a 2026 GMC Sierra 1500. The contact stated that while driving 70 MPH and depressing the accelerator pedal, the vehicle started decelerating unintendedly. The message “Engine Power Reduced” was displayed. A dealer was contacted. The vehicle was taken to a dealer where it was diagnosed and determined that the engine needed to be replaced. The vehicle was repaired. The manufactur
... er was notified of the failure and opened a case. The approximate failure mileage was 6,028.Read more
Incident date: Jul 11, 2026
The timing chain snapped and caused the engine to seize on our 2016 GMC Terrain 2.4L SLC-1 SUV/Truck. Since this has occurred multiple times on the 2.4L engines in this model from 2012 - 2016, we believe that there should be a recall as this issue could cause a major accident if the timing chain snaps or breaks while traveling. It had 101000 miles on it when we bought it used from Klein Automotiv
... e, on April 12, 2024. We have only had it for 2 years and 4 months and kept it in good repair. We took it in for its oil change, brought it home, went to dinner 4 days after and the very next day it wouldn't start. We thought it was most likely the starter/solenoid, but the mechanic said those were both fine and that's when we got the bad news that the motor was shot because the timing chain broke which caused some engine rods to break. The GMC dealer, in Marinette, WI, we brought our used 2016 GMC Terrain to, told us that the timing chain stretched and broke the rods in the engine and therefore both the timing chain and engine need to be replaced. The check engine light was turning on all of the time, and we were told that it was because it needed the 88 fuels (medium grade). As long as we put in the 88, the light check engine light stayed off. We believe there should be a recall for the 2012 - 2016 GMC Terrain SLC-1 2.4L timing chain and engine. We also need assistance with the cost of the repairs because I'm on a limited income and cannot afford the $10,000 cost of getting this repaired, while I still owe $7800 on it.Read more
Incident date: Jul 31, 2026
The contact owns a 2022 GMC Sierra 3500. The contact stated that while driving 65 MPH and depressing the accelerator pedal, the vehicle hesitated before going into LIMP Mode. A dealer was contacted. No warning light was illuminated. The vehicle was towed to a dealer where it was diagnosed with transmission control valve failure. The vehicle was not repaired. The contact associated the failure with
... NHTSA Campaign Number: 24V797000 (POWER TRAIN); however, the VIN was not included in the recall. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline to report the failure. The approximate failure mileage was 71,000.Read more
Incident date: Aug 10, 2025
The vehicle’s headlights are malfunctioning, creating a safety concern. The issue was reported to the dealership and GMC Customer Care, but it remains unresolved. The dealership offered repair assistance, but GMC Customer Care stated that no additional assistance is available.
Incident date: Feb 4, 2026
The vehicle’s headlights are malfunctioning, creating a safety concern. The issue was reported to the dealership and GMC Customer Care, but it remains unresolved. The dealership offered repair assistance, but GMC Customer Care stated that no additional assistance is available.
Incident date: Jun 1, 2026
There was a catastrophic internal engine failure, due to cam/lifter/bearing issues. This caused the timing chain and tensioner to jump and the engine to be out of alignment. This caused the valves to all be bent as a result. I believe that this has been an issue for longer than what GM has originally recalled for, and I am submitting this complaint because I read that there is an active investigat
... ion into this.Read more
Incident date: Jul 4, 2026
The fuel pump control module went bad and the vehicle shut off while driving. The vehicle is only 3 years old. Everyone I know with a GM truck or SUV has had the same issue and the dealer service writer even told me they get at least 6 vehicles with the same issue per week. There is already a recall for GM SUV's for 2021-22 model years but not for anything else even though many other vehicles h
... ave the same issue. They replaced the module under warranty but it is all but guaranteed to just keep happening.Read more
Incident date: Aug 11, 2026
I’m gettin solenoid 6 stuck codes
Incident date: Aug 10, 2026
2023 GMC Yukon XL(6.2 liter engine).Engine has failed twice with the first incident being on the interstate and the engine seized without warning with only 38,000 miles. GMC replaced the engine and now the second engine has failed with only 80,000 miles on it. I am told there needs to be a third engine installed and the vehicle is only three years old. If an engine fails without warning this puts
... everyone in danger. My [XXX] son was in the car when the first engine failed. There is an obvious manufacturer's defect that needs to be addressed before innocent people are injured or killed. The vehicle is currently located at Darrell Waltrip GMC in Franklin, Tennessee. It is not drivable. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)Read more
Incident date: Jun 26, 2025
I was in a rollover accident on June 26th 2025 in my boyfriends 2007 GMC Sierra 1500 where we flipped 5 and a half times. The wheel separated from the rim. I will upload photos since I am unsure how to explain how the wheel damage is. During the crash the drivers air bags deployed but the passengers did not. When we finally landed we ended up on the roof. My boyfriend tried to unbuckle my seatbelt
... but it would not release. He ended up cutting my seatbelt and then at that time (approx 3 min after we landed) the passenger airbag deployed striking my boyfriend in the back, neck and head. Which knocked him out for approx 1 hour. My boyfriend had several open lacerations to his back, neck, head and his arms and metal pieces were imbedded in his skin. He also suffered other injuries like a fractured back, and several other medical problems.I got a severe concussion in which it has caused me severe headaches, memory problems and cognitive issues. Both of us have reduced quality of life.Read more
Crash
2 injured
Incident date: Jun 26, 2025
I was in a rollover accident on June 26th 2025 in my boyfriends 2007 GMC Sierra 1500 where we flipped 5 and a half times. The wheel separated from the rim. I will upload photos since I am unsure how to explain how the wheel damage is. During the crash the drivers air bags deployed but the passengers did not. When we finally landed we ended up on the roof. My boyfriend tried to unbuckle my seatbelt
... but it would not release. He ended up cutting my seatbelt and then at that time (approx 3 min after we landed) the passenger airbag deployed striking my boyfriend in the back, neck and head. Which knocked him out for approx 1 hour. My boyfriend had several open lacerations to his back, neck, head and his arms and metal pieces were imbedded in his skin. He also suffered other injuries like a fractured back, and several other medical problems.I got a severe concussion in which it has caused me severe headaches, memory problems and cognitive issues. Both of us have reduced quality of life.Read more
Crash
2 injured
Incident date: Jun 26, 2025
I was in a rollover accident on June 26th 2025 in my boyfriends 2007 GMC Sierra 1500 where we flipped 5 and a half times. The wheel separated from the rim. I will upload photos since I am unsure how to explain how the wheel damage is. During the crash the drivers air bags deployed but the passengers did not. When we finally landed we ended up on the roof. My boyfriend tried to unbuckle my seatbelt
... but it would not release. He ended up cutting my seatbelt and then at that time (approx 3 min after we landed) the passenger airbag deployed striking my boyfriend in the back, neck and head. Which knocked him out for approx 1 hour. My boyfriend had several open lacerations to his back, neck, head and his arms and metal pieces were imbedded in his skin. He also suffered other injuries like a fractured back, and several other medical problems.I got a severe concussion in which it has caused me severe headaches, memory problems and cognitive issues. Both of us have reduced quality of life.Read more
Crash
2 injured
Incident date: Aug 11, 2026
The rear stationary/fixed sunroof glass spontaneously shattered while i was driving. I heard a loud pop, after i parked i checked the car to see what happened and found a shattered sunroof. There was no impact or known object that struck the glass.
Incident date: Jun 29, 2024
rear sliding window has plastic body seam that is broken allowing water to leak into the truck and cause mold and rust
Incident date: Aug 10, 2026
Truck feels like it is going over rumble strips when accelerating. There is a NTHSA bulletin for this. 21-NA-047
Incident date: Aug 6, 2026
During heavy rain, the sunroof on my Terrain leaked badly enough to allow a substantial amount of water into the vehicle. The rear floor area became completely saturated, and the sunroof controls stopped working. I brought the vehicle to Hudson Cadillac Buick GMC in Poughkeepsie, New York, to have the problem diagnosed and repaired. The resulting repairs and water-damage cleanup cost me nearly $3,
... 000 out of pocket. I was advised that the damage was not covered by my warranty or by my insurance. What concerns me most, however, is that this does not appear to have been an isolated incident. While my Terrain was at the dealership, I learned that four other GMC Terrains were also at the dealership experiencing water damage related to leaking sunroofs. Mine was the fifth. Finding five Terrains at the same dealership with what appeared to be similar water-intrusion problems was extremely concerning to me and made me question whether this is a recurring issue with these vehicles. I also have a video provided by the dealership documenting the water damage to my vehicle, and I am happy to provide that video, my repair invoice, photographs, or any other documentation you would like to review. They went to great lengths to dry the vehicle, which was especially important to me because I was extremely concerned about hidden moisture and dangerous mold. Thankfully, after their work, there is no odor and no indication of remaining moisture or mold, and I am very satisfied with the quality of the repair and cleanup. The extent of the water damage was frightening. At one point, I was genuinely concerned that I might have to get rid of the vehicle simply because I was afraid of the long-term consequences of having so much water inside it. I am very grateful that the dealership was able to restore the vehicle so thoroughly but there is still a possibility that the repair will fail and I will have to replace the sunroof module.Read more
Incident date: Jul 13, 2026
The contact owns a 2007 GMC Yukon XL. The contact stated that the tailgate failed to open as needed. The contact researched and became aware that the issue was a known failure. The contact was informed that an undisclosed repair needed to be performed to release the tailgate. The contact stated that the area was extremely difficult to access to release the tailgate. The contact had scheduled an ap
... pointment with a certified mechanic to diagnose and repair the vehicle. The manufacturer was not made aware of the issue. The failure mileage was approximately 182,000.Read more
Incident date: Apr 15, 2026
Truck vibrates at speeds from 25-45 mph while maintaining speed
Incident date: Mar 23, 2026
During first oil change at 1200 miles, found a lot of metal flex in the oil filter element after cutting the oil filter open.
Incident date: Aug 10, 2026
Whilst driving down the highway at 65 mph the plastic front grill deflector broke off and slammed into my windshield and the vehicle behind me. Luckily the vehicle behind me sustained no damage other than how frightened she and her children were. This is a known issue and was subject to a recall for the 2022 GMC Sierra Denali's. Nothing has changed between the 2 models as far as I can tell and
... it's the exact same grill deflector. When I informed the dealership of this they told me it would be a $950 repair out of pocket. First of all, it is unacceptable for a $75,000 vehicle to have a plastic component that can just break off and become an immediate and unavoidable hazard on the highways. The recall MUST be extended to these vehicles. I have reached out to GM and they confirmed it would be an out of pocket expense, but I am escalating the situation. Thank you!Read more
Incident date: Nov 20, 2023
At approximately 85,000 miles, the engine in my 2019 GMC Sierra 1500 seized. The vehicle was parked when it occurred. Inability to start. This created a safety risk because an engine seizure can cause sudden loss of propulsion in traffic. Before the failure, I did not notice any red flags. The problem was inspected and confirmed by a GMC dealer, which diagnosed the condition as an engine seizure.
... The failed engine is not available for inspection. I am not aware of the precise internal cause beyond the dealer’s diagnosis.Read more
Incident date: Nov 20, 2023
At approximately 85,000 miles, the engine in my 2019 GMC Sierra 1500 seized. The vehicle was parked when it occurred. Inability to start. This created a safety risk because an engine seizure can cause sudden loss of propulsion in traffic. Before the failure, I did not notice any red flags. The problem was inspected and confirmed by a GMC dealer, which diagnosed the condition as an engine seizure.
... The failed engine is not available for inspection. I am not aware of the precise internal cause beyond the dealer’s diagnosis.Read more
Incident date: Nov 20, 2023
At approximately 85,000 miles, the engine in my 2019 GMC Sierra 1500 seized. The vehicle was parked when it occurred. This created a safety risk because an engine seizure can cause sudden loss of propulsion in traffic. Before the failure, I didn't notice anything that would raise any alarms. The problem was inspected and confirmed by a GMC dealer, which diagnosed the condition as an engine seizure
... . The failed engine is not available for inspection. I am not aware of the precise internal cause beyond the dealer’s diagnosis.Read more
Incident date: Nov 20, 2023
At approximately 85,000 miles, the engine in my 2019 GMC Sierra 1500 seized. The vehicle was parked when it occurred. This created a safety risk because an engine seizure can cause sudden loss of propulsion in traffic. Before the failure, I didn't notice anything that would raise any alarms. The problem was inspected and confirmed by a GMC dealer, which diagnosed the condition as an engine seizure
... . The failed engine is not available for inspection. I am not aware of the precise internal cause beyond the dealer’s diagnosis.Read more
Incident date: Jul 23, 2026
The automatic emergency braking system on our 2023 GMC Canyon engaged suddenly 3 separate times while we were driving at around 50 MPH on a clear, straight road with no obstructions. We brought the truck to the dealership the next day, and the service department said it was a software issue and reprogrammed the truck's computer. This did not fix the problem, and we experienced the same unexpecte
... d automatic braking while driving at 50 MPH on a clear road. We brought the truck to the dealer again, and it has remained there ever since. This poses a risk for sudden unexpected stops, loss of control of the vehicle and rear end collision. There were no warning lights to indicate a problem. In addition, the blind spot indicator light on the drivers side starts blinking when there is nothing in the blind spot. We first notice the problem July 23, 2026 and it recurred on August 6 2026.Read more
Incident date: Jul 23, 2026
The automatic emergency braking system on our 2023 GMC Canyon engaged suddenly 3 separate times while we were driving at around 50 MPH on a clear, straight road with no obstructions. We brought the truck to the dealership the next day, and the service department said it was a software issue and reprogrammed the truck's computer. This did not fix the problem, and we experienced the same unexpecte
... d automatic braking while driving at 50 MPH on a clear road. We brought the truck to the dealer again, and it has remained there ever since. This poses a risk for sudden unexpected stops, loss of control of the vehicle and rear end collision. There were no warning lights to indicate a problem. In addition, the blind spot indicator light on the drivers side starts blinking when there is nothing in the blind spot. We first notice the problem July 23, 2026 and it recurred on August 6 2026.Read more
Incident date: Nov 20, 2023
all my lights came on for all of these and break Adaptive Cruise Control Automatic Emergency Braking Blind Spot Warning Forward Collision Warning Lane Departure Warning Lane Keeping Assistance Parking Collision Warning Rear Cross Traffic Warning