Showing 64,800 complaints for GMC
Incident date: Aug 27, 2026
Filing as a proactive data point for the ongoing NHTSA Office of Defects Investigation Engineering Analysis (EA26005) regarding GM 6.2L L87 engine failures. Vehicle is a 2026 GMC Yukon XL AT4 equipped with the 6.2L V8 and 10-speed transmission. The vehicle currently has approximately 2,800 miles and operates perfectly with no mechanical symptoms, ticking, or loss of propulsion. As an active pr
... eventive measure against internal component contamination, early engine oil changes were performed at 700 miles and 1,700 miles by a certified franchise dealer (Alpine Buick GMC). The engine continues to use the factory-specified 0W-20 oil viscosity. A magnetic oil drain plug has been installed to monitor for premature ferrous bearing and crankshaft debris at future service intervals. This report is submitted to ensure 2026 model year data running 0W-20 oil is officially documented within the federal investigation scope.Read more
Incident date: Aug 16, 2026
The powertrain malfunctioned and it at the dealership for an engine replacement. The vehicle lost propulsion on a 2-lane road while passing another vehicle. It cut off completely and started to decelerate. There was no warning or indication that this would happen and was dangerous in that I was accelerating to pass another vehicle when the event occurred. I was able to safely pull into a driveway
... , but the vehicle would not crank as it could not detect what gear it should be in. It was towed to a GMC dealership locally who confirmed 2 days later that the engine would have to be replaced. It is under warranty and will take 3-4 weeks.Read more
Incident date: Jul 27, 2026
The contact owns a 2008 GMC Sierra 1500. The contact stated that while driving at approximately 30 MPH and towing a camper, the vehicle began to bounce while navigating curves. The traction control warning light illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed that the engine variable displacement lifter pins had failed. The vehicle was not repaired. The manufa
... cturer was not notified of the failure. The failure mileage was approximately 157,000. The VIN was unavailable.Read more
Incident date: Jul 27, 2026
The contact owns a 2008 GMC Sierra 1500. The contact stated that while driving at approximately 30 MPH and towing a camper, the vehicle began to bounce while navigating curves. The traction control warning light illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed that the engine variable displacement lifter pins had failed. The vehicle was not repaired. The manufa
... cturer was not notified of the failure. The failure mileage was approximately 157,000. The VIN was unavailable.Read more
Incident date: Aug 5, 2026
While driving on a public road, the vehicle suddenly shut down and rebooted itself. Motive power was lost during the event. This has happened at least a dozen times during normal driving, including while transporting a child. Video of an occurrence was recorded. The vehicle is a 2025 GMC Hummer EV with approximately 10,400 miles and has been in service about eight months. This creates a serious s
... afety risk. A sudden loss of propulsion and system reboot while moving can leave the driver unable to maintain speed or control in traffic and increases the risk of a crash. The vehicle has also had other problems that have been reported to an authorized GMC dealer: a front tire worn to the cords at low mileage, ADAS / Super Cruise and unexpected braking concerns, and water intrusion that has caused electrical failures affecting windows, locks, and mirrors. The manufacturer’s EV Concierge team has been contacted and the concerns have been documented. The mid-drive shutdown and reboot have not yet been fully diagnosed on a dealer repair order. No warning was consistent enough to prevent the shutdown events. The vehicle remains in use but parked and is available for inspection. Dealer and manufacturer have been made aware of the broader defect history. The shutdown condition continues to recur.Read more
Incident date: Aug 5, 2026
While driving on a public road, the vehicle suddenly shut down and rebooted itself. Motive power was lost during the event. This has happened at least a dozen times during normal driving, including while transporting a child. Video of an occurrence was recorded. The vehicle is a 2025 GMC Hummer EV with approximately 10,400 miles and has been in service about eight months. This creates a serious s
... afety risk. A sudden loss of propulsion and system reboot while moving can leave the driver unable to maintain speed or control in traffic and increases the risk of a crash. The vehicle has also had other problems that have been reported to an authorized GMC dealer: a front tire worn to the cords at low mileage, ADAS / Super Cruise and unexpected braking concerns, and water intrusion that has caused electrical failures affecting windows, locks, and mirrors. The manufacturer’s EV Concierge team has been contacted and the concerns have been documented. The mid-drive shutdown and reboot have not yet been fully diagnosed on a dealer repair order. No warning was consistent enough to prevent the shutdown events. The vehicle remains in use but parked and is available for inspection. Dealer and manufacturer have been made aware of the broader defect history. The shutdown condition continues to recur.Read more
Incident date: Aug 5, 2026
While driving on a public road, the vehicle suddenly shut down and rebooted itself. Motive power was lost during the event. This has happened at least a dozen times during normal driving, including while transporting a child. Video of an occurrence was recorded. The vehicle is a 2025 GMC Hummer EV with approximately 10,400 miles and has been in service about eight months. This creates a serious s
... afety risk. A sudden loss of propulsion and system reboot while moving can leave the driver unable to maintain speed or control in traffic and increases the risk of a crash. The vehicle has also had other problems that have been reported to an authorized GMC dealer: a front tire worn to the cords at low mileage, ADAS / Super Cruise and unexpected braking concerns, and water intrusion that has caused electrical failures affecting windows, locks, and mirrors. The manufacturer’s EV Concierge team has been contacted and the concerns have been documented. The mid-drive shutdown and reboot have not yet been fully diagnosed on a dealer repair order. No warning was consistent enough to prevent the shutdown events. The vehicle remains in use but parked and is available for inspection. Dealer and manufacturer have been made aware of the broader defect history. The shutdown condition continues to recur.Read more
Incident date: Aug 15, 2026
The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving approximately 25 MPH near the residence with the contact's daughter as a passenger, the vehicle experienced a complete loss of motive power when depressing the accelerator pedal. Several unspecified warning lights illuminated. The contact and the passenger pushed the vehicle to the residence. The vehicle was towed to an
... independent mechanic, where it was diagnosed that the electrical system experienced a severe power loss and the electrical modules were damaged. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 89,000.Read more
Incident date: Jun 1, 2024
The contact owns a 2021 GMC Sierra 1500. The contact stated that the vehicle was experiencing excessive oil consumption. The low oil level was observed, and the oil warning light illuminated. The vehicle was previously serviced at the dealer, where it was discovered that the oil was 3 quarts low at approximately 56,653 miles. The vehicle was returned to the dealer, where an oil consumption test wa
... s performed. After driving 3,000 miles, it was observed that the oil level was 2 quarts low on July 16, 2024. The dealer confirmed there was no recall coverage, and the vehicle was not repaired. The contact associated the failure with NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the dealer and manufacturer confirmed the VIN was not included. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 59,075.Read more
Incident date: Jul 3, 2026
Engine failure due main bearing and rod failure. Engine had heavy knocking.
Incident date: Aug 14, 2026
As my wife was driven she heard some noise and notice she was losing power. She pull off the side of the road and the car shut off. Could not restart. This happen about 11:30 am on 8/14/26 Got towed to Salida Dealer called Faricy GMC about 3:30 pm. Dealer said it was a complete engine failure and engine needed to be replaced.
Incident date: Jul 4, 2026
I know an engineering analysis has been opened on the 6.2L motor for GM models. I just want on the record that my wife has a 2022 GMC Denali XL that had the engine replaced in December 2025. After that motor replacement it repeated the same issue July 4th 2026 and the dealership replaced the engine a second time for the same reason, and I will be attaching each invoice for both replacements. Ju
... st want to have the #'s updated to show the remedy doesn't seem to work or in my case it didn't and I have seen numerous news articles talking about this.Read more
Incident date: Aug 27, 2026
Driving at highway speed vehicle began making odd engine noises and then lost power, pulled over and power continued to diminish until vehicle was no longer operable.
Incident date: Aug 18, 2026
While driving in passing lane on interstate highway at approximately 65 mph engine lost power. Dashboard warning "vehicle in neutral" message appeared. "Press start" message appeared. Tried to start the engine but did not start. Slight downhill while on highway and had to make it to right shoulder since no shoulder on left side of highway. Glided across 2 lanes to right lane and luckily an exit ca
... me up while still gliding slightly downhill. Exited ramp and got off highway to an empty parking lot. Put vehicle in Park. Since engine failed, power steering was normal as was all electrical components. Once stopped, vehicle was not able to be shifted into Neutral. Message " unable to shift to Neutral under conditions " appeared. Vehicle had to be towed with rear wheels on dollies since it was stuck in Park. Was very lucky to get vehicle across lanes of traffic and off highway to a safe location. Had vehicle towed to nearest GMC dealership where it was diagnosed as internal engine failure covered under recall for this particular engine. (6.2 liter).Read more
Incident date: May 28, 2026
This truck has the GM L87 6.2L engine that is currently on recall for 2021- 2024 model years, but recently the NHTSA is looking into post engine replacement failures and 2025-26 model year issues. My engine at 7,000 miles failed for rod bearings. Same issues reported years ago and 100k engines ago. GM has not fixed the problem, its still happening.
Incident date: Aug 30, 2021
This truck was bought brand new by my father. Around 38,000 miles it begin having issues with shifting which eventually got worse. When I searched google for issues many others on different pages have had the same issues. The shifting would be so rough it feels like you're being hit by another vehicle. This could cause accidents for anyone who cannot afford to fix these known issues by GMC. I was
... told today by my local dealership their transmissions for my specific truck is on backorder. Should that not indicate an issue when this truck is a 2020. But to my father having a stroke I was not able to handle this issue sooner as he was very ill for four years and passed last year. The truck was not the priority at the time.Read more
Incident date: Aug 30, 2021
This truck was bought brand new by my father. Around 38,000 miles it begin having issues with shifting which eventually got worse. When I searched google for issues many others on different pages have had the same issues. The shifting would be so rough it feels like you're being hit by another vehicle. This could cause accidents for anyone who cannot afford to fix these known issues by GMC. I was
... told today by my local dealership their transmissions for my specific truck is on backorder. Should that not indicate an issue when this truck is a 2020. But to my father having a stroke I was not able to handle this issue sooner as he was very ill for four years and passed last year. The truck was not the priority at the time.Read more
Incident date: Aug 30, 2021
This truck was bought brand new by my father. Around 38,000 miles it begin having issues with shifting which eventually got worse. When I searched google for issues many others on different pages have had the same issues. The shifting would be so rough it feels like you're being hit by another vehicle. This could cause accidents for anyone who cannot afford to fix these known issues by GMC. I was
... told today by my local dealership their transmissions for my specific truck is on backorder. Should that not indicate an issue when this truck is a 2020. But to my father having a stroke I was not able to handle this issue sooner as he was very ill for four years and passed last year. The truck was not the priority at the time.Read more
Incident date: Aug 5, 2026
Misfire on 2 cylinder, noise on start up diagnostic code P0300 P0302 P050 I was driving home and the engine started making a strange sound, vehicle would could no increase speed normally. The dealership did basic analysis from the onboard computer and did a compression test. Heavy knocking sound on passenger side of the engine. The issue happened on Aug 5th 2026. The issue is due to the AFM t
... hat causes the lifter to fail and dealership says I need a new engine $15787 or replace cam shaft $14530.Read more
Incident date: Aug 13, 2026
My vehicle had a previous engine recall that was “fixed” per the dealership recommendations. However, I succumbed to total engine failure last week at 70000 miles with my 2 little kids in the car on an interstate. My engine needs replaced.
Incident date: Jul 27, 2026
The control valve body failed. There are so many, that there was a shortage of parts. Had to take it in as it went into limp mode. 34,000 miles. There were dozens of trucks, same year, waiting for the same repair. Shop says probably every truck will need it. It is a known issue.
Incident date: Aug 11, 2026
I am reporting a severe, recurring, and life-threatening manufacturing defect involving a sudden, catastrophic loss of motive power at highway speeds on the interstate. This vehicle has suffered two identical valvetrain failures that placed my passengers and nearby motorists in extreme danger. Incident 1 (Approx. 40,000 miles): While traveling at high speed on the interstate, the vehicle violently
... shook, all engine warning lights flashed, and the engine suffered an immediate, near-total loss of propulsion. The vehicle was towed to an authorized GMC dealership, where technicians diagnosed a collapsed Dynamic Fuel Management (DFM) hydraulic lifter in Cylinder 3. The lifter bank was replaced under the factory powertrain warranty. Incident 2 (Approx. 77,000 miles): While driving at high speed on the interstate, the exact same vehicle behavior occurred. The engine suffered a sudden, total loss of power, and all dashboard warning lights illuminated simultaneously. Out of absolute necessity and to avoid a catastrophic high-speed collision on a dangerous stretch of highway, the severely crippled vehicle had to be forced through active interstate traffic without proper engine power all the way to my home. The vehicle has since been inspected by a GMC dealership, which has confirmed that the exact same Cylinder 3 lifter has failed a second time. The dealership and the GMC Regional Service Manager are currently refusing to honor the 24-month dealer-installed service parts warranty, demanding an out-of-pocket deposit of $5,000, and denying alternative transportation. GM's failure to permanently remediate this known, systemic valvetrain defect has twice left me navigating a failing vehicle through high-speed highway traffic, heavily compounding the safety risk.Read more
Incident date: Oct 18, 2025
Vehicle is shuddering during acceleration and while changing gear during driving affected by either the transmission or power train
Incident date: Oct 18, 2025
Vehicle is shuddering during acceleration and while changing gear during driving affected by either the transmission or power train
Incident date: Aug 6, 2026
On XXX my GMC 6.2L Sierra 1500 Denali engine cutoff in Traffic and had to be towed. There was no indications prior to failure. Found out after replacing battery that the 400amp fuse blew and the engine seized. Vehicle was then towed to Hendrick Buick GMC dealer in [XXX] for repair. My engine has 49,500 miles but is out of warranty due to time. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF I
... NFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)Read more
Incident date: Aug 19, 2026
I have a rear sliding window on the cab of my truck that leaks from both ends of the plastic guide. I noticed it when placing my young children in their car seats. I contacted my dealership and was informed the repair would cost $1500+ and not be covered by GM or warranty.
Incident date: Aug 24, 2026
Engine shut off. It did restart after placing it in park. I did own a 2022 Sierra Denali and the motor failed on that vehicle. I swapped out to the 2025 to get away from what I thought was a problem on that vehicle and now learning this is an inherent problem with the 6.2L motors that include this year. As a consumer, I am very infuriated that the problem has been in place for years and still is t
... oday. The DOD system in these motors is also a problem and will eventually rear it's head out of warranty. You can go purchase a DOD delete kit and pay someone to remove and install the kit but at an additional 2500 in expense for parts and labor. This needs to be addressed!Read more
Incident date: Aug 15, 2026
The vehicle’s engine suffered a catastrophic failure and locked up while in operation. The engine is still installed in the vehicle and is available for inspection upon request. The engine suddenly locked up while I was driving, causing the vehicle to lose power and become disabled in traffic. I was forced to get the vehicle out of the flow of traffic and have it towed to a safe location. The s
... udden engine failure created a significant safety risk to me and other motorists, particularly because the failure occurred while the vehicle was being driven. Yes. Integrity Buick GMC in Chattanooga inspected the vehicle and confirmed that the engine had locked up. Only the dealer. No.Read more
Incident date: Aug 18, 2026
The contact owns a 2026 GMC Sierra 1500. The contact stated that while driving approximately 60 MPH, the transmission unexpectedly downshifted and the vehicle decelerated to 10 MPH. No warning light was illuminated. The contact pulled over to the shoulder of the road, and the vehicle was towed to a local dealer. The vehicle remained with the dealer for additional diagnostic tests and unknown recur
... ring failure codes. In addition, the contact stated that the failure worsened and occurred while his wife, sister-in-law, niece, and child were present inside the vehicle. The vehicle was not repaired. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 7,500.Read more
Incident date: Aug 24, 2026
There was a mass recall on 2018 GMC Sierras to due to a faulty break pump vaccum. We are experiencing the same problems but for some reason were not included in the recall. We were told to reach out on here as others have to see what can be done as this is a saftety hazard.
Incident date: Aug 24, 2026
There was a mass recall on 2018 GMC Sierras to due to a faulty break pump vaccum. We are experiencing the same problems but for some reason were not included in the recall. We were told to reach out on here as others have to see what can be done as this is a saftety hazard.
Incident date: Aug 19, 2026
The contact owns a 2026 GMC Yukon. The contact stated that while driving approximately 15-20 MPH and approaching a stop in Nebraska, there was an abnormal sound coming from the vehicle. The vehicle was shaking and vibrating abnormally. The contact called the local dealer, and an appointment was scheduled. The failures persisted while waiting for the appointment. While driving at an undisclosed spe
... ed, the vehicle lost motive power and stalled. The driver alerted OnStar about the failure. The vehicle failed to restart. The vehicle was towed to the local dealer, where it was diagnosed with complete engine failure. The contact was informed that the engine needed to be replaced. The vehicle was repaired; however, the contact no longer wanted the vehicle. The manufacturer was contacted and opened a case and escalated the concerns. The failure mileage was approximately 4,700.Read more
Incident date: Aug 22, 2026
1. What component or system failed or malfunctioned. The Fuel Pump Module failed unexpectedly while the vehicle was being driven. Failure caused the engine to stall, resulting in a complete loss of power and mobility. Unsure if part is available for inspection. 2021 GMC Yukon have a recall N252516900, but our VIN is not included in this. Can our VIN be added to this recall please? 2. How was you
... r safety or the safety of others put at risk? The vehicle abruptly stalled while being driven through a parking lot, causing a complete loss of power and leaving the vehicle disabled in an active traffic area. Because the vehicle could not be shifted out of PARK, it became an obstruction, creating a hazard for other drivers navigating the parking lot and increasing the risk of a collision. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. After the vehicle was towed to a local mechanic on a flatbed truck, the dealer diagnosed and confirmed that the Fuel Pump Module had failed, which caused the vehicle to stall and lose power. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? The vehicle was inspected by a local repair shot, which diagnosed the failed Fuel Pump Module. The vehicle was also evaluated during the towing process. To my knowledge, the manufacturer, police, or insurance representatives have not separately inspected the vehicle or component. 5. Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? Prior to the failure, there were no significant symptoms indicating an imminent fuel system failure. When the incident occurred, the vehicle abruptly stalled, lost all power, and displayed a message indicating that the vehicle was "not in a condition to shift," preventing it from being shifted out of PARK. This message first appeared immediately following event.Read more
Incident date: Aug 22, 2026
1. What component or system failed or malfunctioned. The Fuel Pump Module failed unexpectedly while the vehicle was being driven. Failure caused the engine to stall, resulting in a complete loss of power and mobility. Unsure if part is available for inspection. 2021 GMC Yukon have a recall N252516900, but our VIN is not included in this. Can our VIN be added to this recall please? 2. How was you
... r safety or the safety of others put at risk? The vehicle abruptly stalled while being driven through a parking lot, causing a complete loss of power and leaving the vehicle disabled in an active traffic area. Because the vehicle could not be shifted out of PARK, it became an obstruction, creating a hazard for other drivers navigating the parking lot and increasing the risk of a collision. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. After the vehicle was towed to a local mechanic on a flatbed truck, the dealer diagnosed and confirmed that the Fuel Pump Module had failed, which caused the vehicle to stall and lose power. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? The vehicle was inspected by a local repair shot, which diagnosed the failed Fuel Pump Module. The vehicle was also evaluated during the towing process. To my knowledge, the manufacturer, police, or insurance representatives have not separately inspected the vehicle or component. 5. Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? Prior to the failure, there were no significant symptoms indicating an imminent fuel system failure. When the incident occurred, the vehicle abruptly stalled, lost all power, and displayed a message indicating that the vehicle was "not in a condition to shift," preventing it from being shifted out of PARK. This message first appeared immediately following event.Read more
Incident date: May 18, 2026
The contact owns a 2024 GMC Yukon. The contact stated that while her husband was driving at approximately 45–50 MPH, the vehicle stalled. No warning light was illuminated. The driver pulled over to the side of the road, and the vehicle was towed to the dealer, where it remained for five weeks before being diagnosed. The dealer determined that the engine was blown and needed to be replaced. The v
... ehicle was repaired at the owner's expense. The contact associated the failure with NHTSA Action Number: EA25007 (Engine, Engine and Engine Cooling). The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 63,073.Read more
Incident date: May 18, 2026
The contact owns a 2024 GMC Yukon. The contact stated that while her husband was driving at approximately 45–50 MPH, the vehicle stalled. No warning light was illuminated. The driver pulled over to the side of the road, and the vehicle was towed to the dealer, where it remained for five weeks before being diagnosed. The dealer determined that the engine was blown and needed to be replaced. The v
... ehicle was repaired at the owner's expense. The contact associated the failure with NHTSA Action Number: EA25007 (Engine, Engine and Engine Cooling). The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 63,073.Read more
Incident date: Aug 23, 2026
Had a prior recall a few months back on my truck in reference to the engine. My truck didn’t have an engine issue such as check engine light etc etc etc which required attention. So they only changed the oil to a different velocity. On Sunday afternoon August 23, 2026 while driving on Interstate 20 near Longview, Texas the truck shut off. I had to get it towed to the Chevy dealership (Peltier Ch
... evy in Tyler, Texas).Read more
Incident date: Jul 2, 2026
Complete engine failure. Safety is was put at risk one engine lost propulsion on a bridge with no median. Truck towed to a GM dealer that inspected it and replace the engine. Check engine light and low oil pressure light came on approximately 30 seconds before the engine died.
Incident date: Jul 15, 2026
High pressure fuel pump went at 80k and now on my 2nd transmission under 100k miles this is absolutely absurd
Incident date: Jul 15, 2026
High pressure fuel pump went at 80k and now on my 2nd transmission under 100k miles this is absolutely absurd
Incident date: Aug 7, 2026
Engine went into limp mode and engine is no longer good
Incident date: Dec 5, 2025
My 2025 GMC Sierra 2500 experienced repeated electrical failures that caused complete battery drainage and multiple overnight no‑start conditions within the first year of ownership. These failures occurred in extreme desert heat, where temperatures in [XXX] reach 120°F. A vehicle that repeatedly fails to start in these conditions creates a serious safety hazard, including risk of heat‑related
... medical emergencies if stranded. The defect persisted despite multiple repair attempts and two battery replacements. The dealership ultimately told me I would “need to replace batteries as needed,” instead of diagnosing the underlying electrical issue. Detailed Description of the Problem Multiple overnight no‑start incidents Several jump‑start events required XXX – 15,265 miles: Battery replaced due to electrical drainage XXX: Battery replaced again for the same defect Electrical system continued to fail after repairs Dealer advised ongoing battery replacement rather than addressing root cause The truck was unreliable and unsafe in extreme heat. A no‑start condition in 120°F temperatures can leave occupants stranded without air conditioning, posing a life‑threatening risk. Frequency of the Problem The electrical failure occurred multiple times over several months, including late 2025, early 2026, and again in mid‑2026. The defect was consistent and repeatable. Consequences Risk of being stranded in extreme heat Loss of air conditioning during no‑start events Potential for heat exhaustion or heat stroke Vehicle unreliable for daily use Safety hazard for driver and passengers INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)Read more
Incident date: Dec 5, 2025
My 2025 GMC Sierra 2500 experienced repeated electrical failures that caused complete battery drainage and multiple overnight no‑start conditions within the first year of ownership. These failures occurred in extreme desert heat, where temperatures in [XXX] reach 120°F. A vehicle that repeatedly fails to start in these conditions creates a serious safety hazard, including risk of heat‑related
... medical emergencies if stranded. The defect persisted despite multiple repair attempts and two battery replacements. The dealership ultimately told me I would “need to replace batteries as needed,” instead of diagnosing the underlying electrical issue. Detailed Description of the Problem Multiple overnight no‑start incidents Several jump‑start events required XXX – 15,265 miles: Battery replaced due to electrical drainage XXX: Battery replaced again for the same defect Electrical system continued to fail after repairs Dealer advised ongoing battery replacement rather than addressing root cause The truck was unreliable and unsafe in extreme heat. A no‑start condition in 120°F temperatures can leave occupants stranded without air conditioning, posing a life‑threatening risk. Frequency of the Problem The electrical failure occurred multiple times over several months, including late 2025, early 2026, and again in mid‑2026. The defect was consistent and repeatable. Consequences Risk of being stranded in extreme heat Loss of air conditioning during no‑start events Potential for heat exhaustion or heat stroke Vehicle unreliable for daily use Safety hazard for driver and passengers INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)Read more
Incident date: Dec 5, 2025
My 2025 GMC Sierra 2500 experienced repeated electrical failures that caused complete battery drainage and multiple overnight no‑start conditions within the first year of ownership. These failures occurred in extreme desert heat, where temperatures in [XXX] reach 120°F. A vehicle that repeatedly fails to start in these conditions creates a serious safety hazard, including risk of heat‑related
... medical emergencies if stranded. The defect persisted despite multiple repair attempts and two battery replacements. The dealership ultimately told me I would “need to replace batteries as needed,” instead of diagnosing the underlying electrical issue. Detailed Description of the Problem Multiple overnight no‑start incidents Several jump‑start events required XXX – 15,265 miles: Battery replaced due to electrical drainage XXX: Battery replaced again for the same defect Electrical system continued to fail after repairs Dealer advised ongoing battery replacement rather than addressing root cause The truck was unreliable and unsafe in extreme heat. A no‑start condition in 120°F temperatures can leave occupants stranded without air conditioning, posing a life‑threatening risk. Frequency of the Problem The electrical failure occurred multiple times over several months, including late 2025, early 2026, and again in mid‑2026. The defect was consistent and repeatable. Consequences Risk of being stranded in extreme heat Loss of air conditioning during no‑start events Potential for heat exhaustion or heat stroke Vehicle unreliable for daily use Safety hazard for driver and passengers INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)Read more
Incident date: Jun 25, 2026
Engine locked up and seized traveling 75mph on interstate with only 28,000 miles
Incident date: Aug 11, 2026
Vehicle became disabled. GM service center determined that the crankshaft failed and lifter rods bent causing total engine failure. GM service center unable to determine cause and the engine is being replaced at a significant out of pocket cost.
Incident date: Aug 23, 2026
Truck milage at the time of engine failure was 9,101. Well past the break in period for towing. We were towing a car trailer 2,000 pounds less the max towing capacity for the truck and going less than the posted speed limit. The truck was also in tow haul mode. The truck dash flashed oiled heating hot. We tried to pull over on the highway then the truck lost all power and overheated. Our trail
... er was not all the way off the highway, so a WY State Trooper pulled behind us and kept his lights flashing for 3 hours until a tow truck came. Truck could not be placed in neutral, so it had to be dragged onto the flat bed ramp of the tow truck. Truck was towed to the Gillette WY GMC dealership that same day. On Monday we were informed that the engine failed and needed to be totally replaced. The GM dealer cannot tell us how long it will take to get the new engine or how long we will be without the truck. This is the 6.2 V8 which GM assured buyer's of 2026 vehicles that the engine failures reported on previous year vehicles had been rectified on the new models. Less than 10,000 and the engine failed.Read more
Incident date: Aug 10, 2026
Vehicle started showing a po308 code. Called sewell gmc In midland where I purchased the vehical they were 2 months out on diagnostic services. So I took it to another shop. They ran a camera into the problem cylinder and for scaring on the walls. They said it was due to the afm system and the engine was unrepairable. So now I am out 17,000 dollars and stranded over 700 miles from my home due to a
... manufactured defect.Read more
Incident date: Aug 10, 2026
Vehicle started showing a po308 code. Called sewell gmc In midland where I purchased the vehical they were 2 months out on diagnostic services. So I took it to another shop. They ran a camera into the problem cylinder and for scaring on the walls. They said it was due to the afm system and the engine was unrepairable. So now I am out 17,000 dollars and stranded over 700 miles from my home due to a
... manufactured defect.Read more
Incident date: Aug 14, 2026
During a family camping trip, our engine seized without warning — a failure directly tied to an active GMC recall. Despite this being a manufacturer defect, GMC roadside assistance refused to provide full support and informed us that we were responsible for towing our trailer home. This placed an unreasonable financial and logistical burden on us during an already distressing situation. To make
... situation worse when we brought the vehicle to O’Meara GMC for the recall repair Four months prior.They kept our truck for an entire week, only to inform us that their “solution” was to put heavier-weight oil in the engine. This is not a recall repair. It is not a fix. It is a temporary workaround that demonstrates clear incompetence and an inability or unwillingness to replace the motor as required under the recall. O’Meara GMC failed to perform the recall repair, failed to replace the engine, and failed to provide any meaningful resolution. Their actions have left us with a vehicle that is unsafe, unreliable, and not repaired according to GMC’s own recall standards.Read more