Showing 64,800 complaints for GMC
Incident date: Jul 29, 2026
I bought a new GMC Sierra 1500 Denali with the 6.2L V8 engine in December of 2025. 7 months later, I was driving home from work. When the car started, it sounded a little louder, but not out of the ordinary. I started driving and got a strange rattle when I was getting on the highway at around 65MPH. I pulled off at the next exit and checked my fluids, checked under the car to see if anything was
... caught that was causing the rattle. All pressures and fluids were normal. I had Onstar run a system diagnostic. The diagnostic read normal. I got back on the highway and drove about 20 miles at 75mph. The rattling continued. 20 miles later, the check engine light came on. I had onstar run a diagnostic and came back stating “engine and transmission system problem” with two error codes. One code said “An issue has been detected in the Variable Valve Timing System adjust the timing of fuel delivery for more efficient engine operation”. The other code said “An issue has been detected in the Ignition System which oversees the timing and spark necessary to ignite fuel in your engine” Both error codes said to fix within one day. The GMC dealership was on the way home so I was going to stop there and see what they could do. I never made it to the dealer. About 2 minutes after the diagnostic, while doing 75mph on the highway, I hit the accelerator and the car did not speed up. The engine then shut off while I was in the left lane doing 75 mph. The electronics stayed on and the dash stated “press start to start engine.” I pulled over to the side of the highway and put the car in park and attempted to restart the engine. The engine never turned over again. I could not get the engine to start. I could not shift the car to neutral to have it rolled up on to the tow truck. My truck was towed to the GMC dealership and they are now replacing the engine under warranty. Will upload any maintenance paperwork once engine is replaced.Read more
Incident date: Jul 27, 2026
My yukon denali ultimate had only 3,788 miles on it and on 7/27 while merging onto a highway my vehicle made a sound like it was trying to shift into gear but couldn't and then while I'm pressing the accelerator pedal it's slowing down. There were tractor trailer and vehicles speeding up behind me but I couldn't speed up and I was able to pull over on the shoulder luckily and I'm thankful it did n
... ot cause an accident. My yukon would not start no matter what I tried and I ended calling a tow truck and had it towed to my local GMC delearship where I was informed that the engine had seized and they would order a new replacement engine. My yukon is still sitting at the dealership waiting for the repair.Read more
Incident date: Jul 3, 2026
9 months into ownership, with 24,000 miles I had complete engine failure pulling into an intersection. Slamming into park while moving and shutting down. This is a known issue with the GM 6.2 liter engines but I specifically waited to order a 2026 as this was far outside the recall window GM had in place for this known issue and was led to believe the issue was fixed going forward. The car was tow
... ed to a GM dealer and sat for 39 days for a complete engine replacement. Now, a week after it has been returned it has sputtered and shut off as I am coming to a stop requiring a restart, not unlike stalling a manual transmission car. I think your agency needs to expand the investigation far further to include 2026 models. This is a 90,000 dollar brand new family hauler that I am supposed to trust my wife and kids are safe in. Now I cannot even trust it will safely take her through an intersection. Thank you for your time.Read more
Incident date: Jul 3, 2026
9 months into ownership, with 24,000 miles I had complete engine failure pulling into an intersection. Slamming into park while moving and shutting down. This is a known issue with the GM 6.2 liter engines but I specifically waited to order a 2026 as this was far outside the recall window GM had in place for this known issue and was led to believe the issue was fixed going forward. The car was tow
... ed to a GM dealer and sat for 39 days for a complete engine replacement. Now, a week after it has been returned it has sputtered and shut off as I am coming to a stop requiring a restart, not unlike stalling a manual transmission car. I think your agency needs to expand the investigation far further to include 2026 models. This is a 90,000 dollar brand new family hauler that I am supposed to trust my wife and kids are safe in. Now I cannot even trust it will safely take her through an intersection. Thank you for your time.Read more
Incident date: Dec 2, 2025
The engine was producing a strange noise while driving and subsequently shut off. The vehicle was towed to a GMC dealership where an inspection/testing was performed. Ultimately, I was told the entire engine needed to be replaced.
Incident date: Aug 15, 2026
On Saturday, August 15th we were driving on the freeway when with no warning the check engine light came on and the vehicle began to run poorly, and then the vehicle lost electrical power and it became difficult to steer and the brake pedal became stiff, making it difficult to stop and pull over. The vehicle would not start on command but kept running very poorly, it also became impossible to shut
... the vehicle off until it seized. It was later towed to a local repair shop, and today, Friday August 21st the shop confirmed that the vacuum pump on the brake assist failed and it would need a total engine replacement.Read more
Incident date: Aug 15, 2026
On Saturday, August 15th we were driving on the freeway when with no warning the check engine light came on and the vehicle began to run poorly, and then the vehicle lost electrical power and it became difficult to steer and the brake pedal became stiff, making it difficult to stop and pull over. The vehicle would not start on command but kept running very poorly, it also became impossible to shut
... the vehicle off until it seized. It was later towed to a local repair shop, and today, Friday August 21st the shop confirmed that the vacuum pump on the brake assist failed and it would need a total engine replacement.Read more
Incident date: Aug 15, 2026
On Saturday, August 15th we were driving on the freeway when with no warning the check engine light came on and the vehicle began to run poorly, and then the vehicle lost electrical power and it became difficult to steer and the brake pedal became stiff, making it difficult to stop and pull over. The vehicle would not start on command but kept running very poorly, it also became impossible to shut
... the vehicle off until it seized. It was later towed to a local repair shop, and today, Friday August 21st the shop confirmed that the vacuum pump on the brake assist failed and it would need a total engine replacement.Read more
Incident date: Jun 6, 2026
See attached document for complaint.
Incident date: Aug 7, 2026
Several months ago while having my truck serviced, I asked the repair shop to inspect the ball joints on the passenger side because they would make a popping noise when turning the wheel. The shop inspected them and said that was a normal sound due tot he factory lift. Recently I was driving home and about to turn into my lane when the front passenger wheel assembly collapsed under the truck due t
... o the a upper ball joint failure separating the brake line and loss of steering. At the time, I was only going about 25mph and the truck slid to a stop on its own. The truck has 65,000 miles on it and if this had happen at highway speeds personal injury to myself and others would have been likely. The repair cost were $7,500. Fortunately I purchased an extended warranty which covered all but $1,700 of the repair.Read more
Incident date: Aug 19, 2026
The contact owns a 2018 GMC Terrain. The contact stated that while her son was driving 45 MPH, the brake pedal was firm while depressed. There was no warning light illuminated. Due to the failure, excessive force was needed on the brake pedal to stop the vehicle. The contact was able to drive the vehicle to the residence. The following day, the vehicle was taken to an independent mechanic. The mec
... hanic diagnosed the vehicle with an inoperable vacuum pump that was shredded and needed to be replaced. The manufacturer was notified of the failure and informed the contact that the VIN was not under recall. The contact was then referred to the NHTSA Hotline for assistance. The vehicle was not yet repaired. The failure mileage was approximately 117,000.Read more
Incident date: Aug 14, 2026
Driving on busy road when heard a squealing from the engine bay of the vehicle. Moments later the vehicle lost power. It was a very dangerous situation traveling approximately 45mph on a multi-lane road in urban St. Louis Missouri. There was not a check engine light prior. The vehicle had a recall performed per GMC instructions prior (this amounted to a different viscosity oil....). The breakdown
... stranded my family and I while on vacation in another city. The vehicle was towed to a local GMC dealership and was diagnosed as a seized engine related to the recall. The engine is scheduled to be replaced as no cost through GMC's extended service. They have not provided coverage for the towing, for the multiple ride shares needed to get around on vacation, for the rental car needed to get home, or a rental car to help us with day-to-day life during the estimated 6-8 weeks we will be waiting. My family was at risk, other motorists on the parkway were at risk. It was pure luck and quick thinking that saved injury or loss of life. It is completely unbelievable GMC is letting these vehicles be on the road for peoples safety and for the money people pay as a consumer.Read more
Incident date: Aug 14, 2026
Driving on busy road when heard a squealing from the engine bay of the vehicle. Moments later the vehicle lost power. It was a very dangerous situation traveling approximately 45mph on a multi-lane road in urban St. Louis Missouri. There was not a check engine light prior. The vehicle had a recall performed per GMC instructions prior (this amounted to a different viscosity oil....). The breakdown
... stranded my family and I while on vacation in another city. The vehicle was towed to a local GMC dealership and was diagnosed as a seized engine related to the recall. The engine is scheduled to be replaced as no cost through GMC's extended service. They have not provided coverage for the towing, for the multiple ride shares needed to get around on vacation, for the rental car needed to get home, or a rental car to help us with day-to-day life during the estimated 6-8 weeks we will be waiting. My family was at risk, other motorists on the parkway were at risk. It was pure luck and quick thinking that saved injury or loss of life. It is completely unbelievable GMC is letting these vehicles be on the road for peoples safety and for the money people pay as a consumer.Read more
Incident date: Aug 14, 2026
Driving on busy road when heard a squealing from the engine bay of the vehicle. Moments later the vehicle lost power. It was a very dangerous situation traveling approximately 45mph on a multi-lane road in urban St. Louis Missouri. There was not a check engine light prior. The vehicle had a recall performed per GMC instructions prior (this amounted to a different viscosity oil....). The breakdown
... stranded my family and I while on vacation in another city. The vehicle was towed to a local GMC dealership and was diagnosed as a seized engine related to the recall. The engine is scheduled to be replaced as no cost through GMC's extended service. They have not provided coverage for the towing, for the multiple ride shares needed to get around on vacation, for the rental car needed to get home, or a rental car to help us with day-to-day life during the estimated 6-8 weeks we will be waiting. My family was at risk, other motorists on the parkway were at risk. It was pure luck and quick thinking that saved injury or loss of life. It is completely unbelievable GMC is letting these vehicles be on the road for peoples safety and for the money people pay as a consumer.Read more
Incident date: Aug 15, 2026
The contact owns a 2023 GMC Yukon. The contact stated that while driving at an undisclosed speed, the vehicle made an abnormal clunking sound. The contact pulled over and inspected under the hood. The vehicle was restarted, and the engine revved six times with smoke coming from under the hood. The contact stated that the transmission was previously replaced. The vehicle was towed to the dealer, wh
... o discovered that Jiffy Lube had used an incorrect engine oil during an oil change. The contact was informed to contact Jiffy Lube and file a claim. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 36,000.Read more
Incident date: Aug 2, 2026
The contact owns a 2010 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 21V053000 (Air Bag). The contact stated that while the vehicle was parked, he became aware that there was a crack on the top of the infotainment system on the dashboard. The contact stated that a month later, the vehicle was taken to a dealer for the recall repair. The vehicle was repaired, but the
... re was a large hole approximately one to two inches in size on the driver's side dashboard near the defroster vent. The manufacturer was notified of the failure. The failure mileage was 102,928.Read more
Incident date: Jul 17, 2026
I purchased this new 2026 GMC Sierra 1500 on 07/16/2026. Beginning shortly after delivery, the vehicle began intermittently losing ALL audio, including the audible turn-signal indication. The condition now occurs approximately once every 3–4 vehicle starts/uses. When the failure occurs, there is no audio from the infotainment system, radio, Apple CarPlay, Bluetooth, or speakers, and there is no
... audible turn-signal sound. Because the failure also eliminates audible driver feedback from the turn signals, I am concerned this is not simply an entertainment-system issue. The vehicle is available for inspection upon request. The vehicle was presented to Ed Morse Sawgrass Auto Mall, an authorized GMC dealer, after the condition occurred again on approximately 08/20/2026. The dealer advised me that the vehicle already has the applicable software programming and that GM is aware of the condition. The Service Manager advised me in writing that GM currently instructs the dealer to recover/reset the radio and not replace the radio or amplifier because GM is working on a permanent correction. Restarting the infotainment system, Safe Mode, disabling Quick Startup, and allowing the vehicle to completely power down have not permanently corrected the condition. A full shutdown may temporarily restore the audio, but the failure returns. There are no warning lamps or messages before the failure. The audio simply does not function when the vehicle is started. The vehicle currently has approximately 976 miles. There has been no crash, fire, injury, or fatality. I have also formally reported the condition to GMC Customer Assistance. GMC Case #108458085.Read more
Incident date: Jun 9, 2026
The truck when put in parking it still roll forward a little bit. Back up camera can’t not see during night time. Dealership stated they will not solve that problem and tell us to do manually by turn around look back. The suspension really bouncy but the tech stated that is normal. Spoke to other 3rd party tech they said that not normal at all.
Incident date: Jun 9, 2026
The truck when put in parking it still roll forward a little bit. Back up camera can’t not see during night time. Dealership stated they will not solve that problem and tell us to do manually by turn around look back. The suspension really bouncy but the tech stated that is normal. Spoke to other 3rd party tech they said that not normal at all.
Incident date: Jun 9, 2026
The truck when put in parking it still roll forward a little bit. Back up camera can’t not see during night time. Dealership stated they will not solve that problem and tell us to do manually by turn around look back. The suspension really bouncy but the tech stated that is normal. Spoke to other 3rd party tech they said that not normal at all.
Incident date: Nov 20, 2025
At approximately 14,000 miles, the 6.2L V8 engine experienced a major failure due to a spun main bearing, which resulted in the complete replacement of the engine. The vehicle remained at the dealership for more than 60 days while the repair was completed. After receiving the vehicle back, it operated without any significant issues until approximately 30,000 miles, when the engine experienced ano
... ther major failure. This second failure was attributed to the lifters, and the engine required substantial repairs and ultimately had to be rebuilt. Having two major engine failures before reaching 30,000 miles—first requiring a complete engine replacement and then requiring the replacement engine to be rebuilt—has raised serious concerns regarding the vehicle’s long-term reliability and durability.Read more
Incident date: Aug 5, 2026
Whole engine replacement at 20000 miles.
Incident date: Jul 1, 2026
The contact owns a 2006 GMC Envoy. The contact stated that while driving various speeds, there was an abnormal burning odor coming from the front driver’s side door circuit board. There was no warning light illuminated. There was a white and grayish smoke coming from the door panel. After removing the door panel, the contact discovered that the source of the smoke was coming from the wiring insi
... de the door. The vehicle was taken to an independent mechanic, and the contact was informed of NHTSA Campaign Number: 15V599000 (Visibility); which the mechanic related to the failure. The vehicle was then taken to a dealer, and the contact was informed that the driver’s side door switch module needed to be replaced; however, the contact declined the dealer's estimate for a comprehensive wiring inspection. The vehicle remained unrepaired with the dealer. The manufacturer was not notified of the failure. The failure mileage was unknown.Read more
Incident date: Aug 3, 2026
Vehicle was traveling at 65 mph on a busy highway when vehicle engine stopped. A message on the dash appeared indicating to driver to shift to neutral and try to restart engine. As vehicle was quickly loosing speed it was decided to coast to the side of road to avoid someone running into vehicle causing multiple cars to crash. After stopping vehicle, an attempt was made to start vehicle. Engine wo
... uld not turn over. Vehicle was towed to dealership. The following day I was informed that the engine needed replacement.Read more
Incident date: Jul 20, 2026
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed and the vehicle started jerking and shaking before unintendedly accelerating. Additionally, the vehicle jerked and started to lose motive power. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was not made aware o
... f the failure. The failure mileage was approximately 108,000.Read more
Incident date: Aug 17, 2026
I have a 2024 GMC Yukon Denali equipped with the 6.2L L87 V8 engine. The vehicle has approximately 23,000 miles. The vehicle previously underwent the remedy associated with the L87 engine recall. The engine now uses SAE 0W-40 dexos R oil and has the corresponding 0W-40 oil fill cap. After the recall remedy was performed, the check-engine warning light began intermittently FLASHING while I am driv
... ing. The light may flash for a period of time and then turn off again. I have also intermittently experienced the engine running rough or the vehicle shaking while idling. I have noticed the flashing warning light occurring while the engine is under load, including while driving uphill. I have video documenting the check-engine light flashing while the vehicle is being driven. Because the condition is intermittent, the warning light is not necessarily illuminated afterward. I am concerned because this vehicle is equipped with the L87 engine that was subject to GM recall N252494000/NHTSA Recall 25V-274 for potential engine damage/failure, and my vehicle appears to have already received the recall remedy. I understand NHTSA is currently investigating reports of L87 engine failures occurring after completion of that recall remedy. The cause of my vehicle's current symptoms is UNKNOWN and has not yet been diagnosed. The vehicle is available for inspection. I am filing this complaint because an intermittently flashing check-engine warning, rough/shaking operation, and the possibility of an engine malfunction or loss of propulsion present a safety concern, particularly if an engine failure occurs while the vehicle is being driven. I do have an appointment with a different GMC dealership for next week instead of the GMC dealership that sold it to me and preformed the original fix.Read more
Incident date: Dec 5, 2023
From time to time since I got the vehicle, the lights flicker inside and out. I've had the alternator changed but it continues. Then when pressing the lock button on the key fob the horn sounds as if it has a shortage. Sometimes its loud and sometimes it's barely heard.
Incident date: Aug 19, 2026
Vehicle: 2026 GMC Sierra 1500 AT4 (3.0L LZ0 Duramax Diesel) Current Mileage: ~16,500 miles Check Engine Light Status: NO Check Engine Light active Description of Incident & Symptoms: •Interstate Incident: While driving at highway speeds, a severe drivetrain vibration occurred (felt like a rear wheel weight flew off). •Dashboard Warnings: Within 5 minutes, intermittent "Traction Control" and
... "Forward Collision Warning" alerts appeared on the dash, accompanied by a sudden drop in engine power. •Engine Noise & Idle: Once safely pulled over, the engine exhibited a loud mechanical knock and a very rough, unstable idle. •Extended Crank: After shutting the engine off and waiting a few minutes, restarting the truck took roughly twice as long as normal (long crank/delayed start)Read more
Incident date: Aug 19, 2026
Vehicle: 2026 GMC Sierra 1500 AT4 (3.0L LZ0 Duramax Diesel) Current Mileage: ~16,500 miles Check Engine Light Status: NO Check Engine Light active Description of Incident & Symptoms: •Interstate Incident: While driving at highway speeds, a severe drivetrain vibration occurred (felt like a rear wheel weight flew off). •Dashboard Warnings: Within 5 minutes, intermittent "Traction Control" and
... "Forward Collision Warning" alerts appeared on the dash, accompanied by a sudden drop in engine power. •Engine Noise & Idle: Once safely pulled over, the engine exhibited a loud mechanical knock and a very rough, unstable idle. •Extended Crank: After shutting the engine off and waiting a few minutes, restarting the truck took roughly twice as long as normal (long crank/delayed start)Read more
Incident date: Aug 19, 2026
Vehicle: 2026 GMC Sierra 1500 AT4 (3.0L LZ0 Duramax Diesel) Current Mileage: ~16,500 miles Check Engine Light Status: NO Check Engine Light active Description of Incident & Symptoms: •Interstate Incident: While driving at highway speeds, a severe drivetrain vibration occurred (felt like a rear wheel weight flew off). •Dashboard Warnings: Within 5 minutes, intermittent "Traction Control" and
... "Forward Collision Warning" alerts appeared on the dash, accompanied by a sudden drop in engine power. •Engine Noise & Idle: Once safely pulled over, the engine exhibited a loud mechanical knock and a very rough, unstable idle. •Extended Crank: After shutting the engine off and waiting a few minutes, restarting the truck took roughly twice as long as normal (long crank/delayed start)Read more
Incident date: Feb 27, 2025
On XXX at approximately 3:00 p.m., I was driving on the highway in [XXX], at approximately 65 mph when my truck suddenly displayed a warning stating that all oil pressure had been lost and that the engine needed to be shut off immediately. Within roughly seven seconds of seeing and comprehending the warning, I attempted to safely shut down the engine. Before I could do so, the engine seized while
... the truck was still traveling at highway speed.The engine failure caused an immediate loss of power steering and power-assisted braking, leaving me with limited control as the truck coasted at highway speed. This was an extremely dangerous situation that could have resulted in a serious accident, injury, or loss of life. The truck was towed to a repair facility, where technicians confirmed that the engine had seized and recommended replacing the long block. A new GM Genuine Parts engine was installed, and the repairs were completed on XXX. Today, XXX, the replacement engine has approximately 40,000 miles on it. I recently began hearing a ticking noise followed by knocking, and the engine nearly stalled while idling. I immediately checked the oil and confirmed that oil was present on the dipstick. I have consistently maintained the vehicle and completed every oil change at intervals of 5,000 miles or fewer. I returned the truck to the same repair facility that installed the replacement engine and was immediately informed that the truck requires yet another engine replacement. This is now the second 6.2L L87 engine that has failed in this vehicle. Two catastrophic engine failures—one involving a replacement GM Genuine Parts engine after only approximately 40,000 miles—are completely unacceptable. The first failure created a severe highway safety hazard, and the failure of the replacement engine raises serious concerns about the reliability and safety of these engines. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)Read more
Incident date: Jul 3, 2026
The contact owns a 2012 GMC Sierra 2500 equipped with Armstrong Tires, Tire Line: Tru Trac HT, Tire Size: 245/75/17, DOT Number: 1E6DAE022625. The contact stated that the vehicle was taken to an independent mechanic for a routine tire rotation but was informed there were massive bubbles on the tires, and on one tire, there was a bulge the size of an apple on the sidewall of the tire. The contact r
... eplaced the tires. The local dealer was not contacted. The manufacturer was contacted and declined to accept the mileage claim and requested photos of the tires. The tire failure mileage was approximately 27,000. The vehicle failure mileage was approximately 146,500.Read more
Incident date: Jul 14, 2026
My 2023 GMC Sierra 1500 SLT 4WD currently at 67659 miles was taken in to the dealer because of excessive jerk when accelerating or trying to reverse, diagnostic scan failed for check engine and ABS trouble codes. The scan return code PO747 indicating transmission pressure control solenoid “A” was stuck on for a predetermined period of time. The recommended repair is replacement of automatic
... transmission, solenoid control valve body. I’m aware that GM has issued a TSB 25–NA-255 and special coverage N24245441–02 addressing this exact failure on the GM 10 speed and that GM previously issued a related recall N242454440 addressing this exact failure on the GM 10 speed transmissions, and that GM previously issued a related recall for this citing rear wheel lock up risk associated with transmission valve condition. My vehicle scan showed an ABS failure at the same time as a transmission. code, consistent with the safety risk. GM has already acknowledged and its own recall documentation however I was told to contact NHTSA to document the safety risk and request investigation of the scope of this defect across affected models years and vehicles as mine seems to have fallen short. I previously owned a 2021GMC vehicle same model that experience the identical transmission valve body failure that vehicle could not be repaired in a reasonable time and I ultimately experience financial loss and had to replace a vehicle now I’m experiencing the same defect on the vehicle purchased (this one) with significantly fewer miles than would be expected for a major transmission failure, indicating that this may be a reoccurring manufacturing design defect rather than an isolated incident. Thank you for your time and I hope this issue can be resolved as I do love the truck otherwise however safety first. Thank youRead more
Incident date: Jul 14, 2026
My 2023 GMC Sierra 1500 SLT 4WD currently at 67659 miles was taken in to the dealer because of excessive jerk when accelerating or trying to reverse, diagnostic scan failed for check engine and ABS trouble codes. The scan return code PO747 indicating transmission pressure control solenoid “A” was stuck on for a predetermined period of time. The recommended repair is replacement of automatic
... transmission, solenoid control valve body. I’m aware that GM has issued a TSB 25–NA-255 and special coverage N24245441–02 addressing this exact failure on the GM 10 speed and that GM previously issued a related recall N242454440 addressing this exact failure on the GM 10 speed transmissions, and that GM previously issued a related recall for this citing rear wheel lock up risk associated with transmission valve condition. My vehicle scan showed an ABS failure at the same time as a transmission. code, consistent with the safety risk. GM has already acknowledged and its own recall documentation however I was told to contact NHTSA to document the safety risk and request investigation of the scope of this defect across affected models years and vehicles as mine seems to have fallen short. I previously owned a 2021GMC vehicle same model that experience the identical transmission valve body failure that vehicle could not be repaired in a reasonable time and I ultimately experience financial loss and had to replace a vehicle now I’m experiencing the same defect on the vehicle purchased (this one) with significantly fewer miles than would be expected for a major transmission failure, indicating that this may be a reoccurring manufacturing design defect rather than an isolated incident. Thank you for your time and I hope this issue can be resolved as I do love the truck otherwise however safety first. Thank youRead more
Incident date: Jul 14, 2026
My 2023 GMC Sierra 1500 SLT 4WD currently at 67659 miles was taken in to the dealer because of excessive jerk when accelerating or trying to reverse, diagnostic scan failed for check engine and ABS trouble codes. The scan return code PO747 indicating transmission pressure control solenoid “A” was stuck on for a predetermined period of time. The recommended repair is replacement of automatic
... transmission, solenoid control valve body. I’m aware that GM has issued a TSB 25–NA-255 and special coverage N24245441–02 addressing this exact failure on the GM 10 speed and that GM previously issued a related recall N242454440 addressing this exact failure on the GM 10 speed transmissions, and that GM previously issued a related recall for this citing rear wheel lock up risk associated with transmission valve condition. My vehicle scan showed an ABS failure at the same time as a transmission. code, consistent with the safety risk. GM has already acknowledged and its own recall documentation however I was told to contact NHTSA to document the safety risk and request investigation of the scope of this defect across affected models years and vehicles as mine seems to have fallen short. I previously owned a 2021GMC vehicle same model that experience the identical transmission valve body failure that vehicle could not be repaired in a reasonable time and I ultimately experience financial loss and had to replace a vehicle now I’m experiencing the same defect on the vehicle purchased (this one) with significantly fewer miles than would be expected for a major transmission failure, indicating that this may be a reoccurring manufacturing design defect rather than an isolated incident. Thank you for your time and I hope this issue can be resolved as I do love the truck otherwise however safety first. Thank youRead more
Incident date: May 19, 2026
The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle jerked and pulled to the right. No warning lights were illuminated. In addition, the contact stated that while driving over a bump in the road, the vehicle lost automotive power and shut off. The contact restarted the vehicle. The vehicle was not diagnosed or repaired by an independe
... nt mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 230,000.Read more
Incident date: May 19, 2026
The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle jerked and pulled to the right. No warning lights were illuminated. In addition, the contact stated that while driving over a bump in the road, the vehicle lost automotive power and shut off. The contact restarted the vehicle. The vehicle was not diagnosed or repaired by an independe
... nt mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 230,000.Read more
Incident date: Nov 25, 2025
The GMC Sierra has a known issue from the manufacturer in which the power sliding rear window can start to leak water into the cab of the truck during rain or other impact with outside water. This issue allows water into the cab through a cracked or faulty seal, which impacts visibility and allows water to penetrate inside, producing risk for moisture to collect on the back window and potentially
... cause mold to grow inside, further creating a health risk. Further, the water intrusion can lead to interior damage, as well as potentially cause electrical failure and unsafe operation. This is a known issue dating back to January 2019 when GM issued Technical Service Bulletin 18-NA-383 and has continued to be revised since. The component has been reviewed and inspected by the dealer and is known to the manufacturer; however, they are unwilling to fix without cost as this is not a recall.Read more
Incident date: Aug 19, 2026
While driving, I suddenly smelled something burning. Immediately after, a warning popped up stating 'Engine power is reducing,' the check engine light came on, and I experienced a sudden, near-total loss of power braking assist, making the brake pedal extremely hard to press. I had to use intense force to bring the vehicle to a stop. A scan of the vehicle's OBD-II codes revealed codes P0556 (Brake
... Booster Pressure Sensor Circuit), P0014 (Exhaust Camshaft Position Timing Over-Advanced), and P0017 (Crankshaft Position - Camshaft Position Correlation). This is a known failure where the engine-driven mechanical brake vacuum pump seizes up, destroys the braking vacuum assist, and bends or shifts the exhaust camshaft reluctor wheel, causing a severe and immediate safety hazard while in motion.Read more
Incident date: Aug 19, 2026
While driving, I suddenly smelled something burning. Immediately after, a warning popped up stating 'Engine power is reducing,' the check engine light came on, and I experienced a sudden, near-total loss of power braking assist, making the brake pedal extremely hard to press. I had to use intense force to bring the vehicle to a stop. A scan of the vehicle's OBD-II codes revealed codes P0556 (Brake
... Booster Pressure Sensor Circuit), P0014 (Exhaust Camshaft Position Timing Over-Advanced), and P0017 (Crankshaft Position - Camshaft Position Correlation). This is a known failure where the engine-driven mechanical brake vacuum pump seizes up, destroys the braking vacuum assist, and bends or shifts the exhaust camshaft reluctor wheel, causing a severe and immediate safety hazard while in motion.Read more
Incident date: Jul 20, 2026
The upper grille trim piece came off while driving down I20 between Hudson Oaks and Willow Park. I was doing between 60-65 mph. It could’ve hit other vehicles behind me, or to the side of me. This piece is a known issue and the 2022’s have a recall but not the 2023 model years. No signs of this being about to break.
Incident date: Aug 15, 2026
As I was driving, the vehicle's air conditioning suddenly began blowing warm/hot air. Moments later, the check engine light and all electronic service stability lights illuminated on the dashboard. Simultaneously, the vehicle suffered a complete loss of electronic brake assist, resulting in an extremely hard brake pedal and a severe reduction in braking power. The vehicle also displayed a "No Driv
... e Mode Available" message. Third-party diagnostic scanning revealed network power codes U3018, U3505, P00FF, and P0700, indicating a total loss of power to the Body Control Module (BCM). This is the second life-threatening incident with this vehicle I have experienced following a previous highway engine stall due to engine recall. The vehicle was towed to a GM dealership for diagnostic and emergency electrical repairs.Read more
Incident date: Aug 15, 2026
As I was driving, the vehicle's air conditioning suddenly began blowing warm/hot air. Moments later, the check engine light and all electronic service stability lights illuminated on the dashboard. Simultaneously, the vehicle suffered a complete loss of electronic brake assist, resulting in an extremely hard brake pedal and a severe reduction in braking power. The vehicle also displayed a "No Driv
... e Mode Available" message. Third-party diagnostic scanning revealed network power codes U3018, U3505, P00FF, and P0700, indicating a total loss of power to the Body Control Module (BCM). This is the second life-threatening incident with this vehicle I have experienced following a previous highway engine stall due to engine recall. The vehicle was towed to a GM dealership for diagnostic and emergency electrical repairs.Read more
Incident date: Aug 15, 2026
As I was driving, the vehicle's air conditioning suddenly began blowing warm/hot air. Moments later, the check engine light and all electronic service stability lights illuminated on the dashboard. Simultaneously, the vehicle suffered a complete loss of electronic brake assist, resulting in an extremely hard brake pedal and a severe reduction in braking power. The vehicle also displayed a "No Driv
... e Mode Available" message. Third-party diagnostic scanning revealed network power codes U3018, U3505, P00FF, and P0700, indicating a total loss of power to the Body Control Module (BCM). This is the second life-threatening incident with this vehicle I have experienced following a previous highway engine stall due to engine recall. The vehicle was towed to a GM dealership for diagnostic and emergency electrical repairs.Read more
Incident date: May 20, 2026
The car’s brakes hardened on the highway, posing a life-threatening danger, right before the engine died. Following a tow to the dealership’s service center, an initial inspection revealed a broken vacuum pump and broken camshaft. The dealership stated that there was evidence that camshaft debris may be scattered throughout the engine. No further inspection has been done at this time due to th
... e probability of major engine damage and/or potential repairs.Read more
Incident date: May 20, 2026
The car’s brakes hardened on the highway, posing a life-threatening danger, right before the engine died. Following a tow to the dealership’s service center, an initial inspection revealed a broken vacuum pump and broken camshaft. The dealership stated that there was evidence that camshaft debris may be scattered throughout the engine. No further inspection has been done at this time due to th
... e probability of major engine damage and/or potential repairs.Read more
Incident date: Jun 21, 2026
On XXX at 1:56pm, I took the vehicle to Jiffy Lube service center #810 for the "Quick Oil Change Service" which includes checking and filling the Tranmission/Axle fluid. Per the attached receipt the Transmission/Axle fluid was "OK", and the next service was recommended after 5,000 addtional miles from the then current mileage of 153,317. On the morning o XXX, the car began experiencing issues ide
... ntical to vehicle recall NHTSA ID Number: 20V668000. The check engine light turned on and the vehicle could maintain proper propulsion. On XXX at 3:25pm EST, I took the vehicle to AutoZone store #01664, whose "FixFinder" computer diagnostic inicated code PO700 "Transmission Control Module Requested MIL Illumination". On XXX, I had the car towed to a private mechanic who inspected the Vehicle and indicated that the transmission had "no fluid" despite having the fluids verified by Jiffy Lube on XXX. The mechanic suggested there may be a GMC service issue that required GMC remediation to due faulty internals which resulted in the transmission fluid leakage and subsequent triggering of the transmission computer module and related propulsion failure. As of today XXX, the vehicle is experiencing the same condition as indicated in vehicle recall NHTSA ID Number: 20V668000, which is creating additonal risk of vehicular accident/crash and vehicle fire in the presence of the ignition source. The milage is now 155,520. I am requesting this vehicle be serviced as part of recall NHTSA ID Number: 20V668000, you can verify from the vehicle registration from the Divison of Motor Vehicles and via CarFax that I purchased this vehicle used, the vehiclee has at least 1 (maybe 2) prior owners. I am requesting the vehicle (VIN [XXX]) receive the mandated recall service which will resolve the afformentioned issues and remove the related risks for myself, my passengers and all other motorists who are sharing the road. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)Read more
Incident date: Aug 14, 2026
The upper grill chrome trim blew off at highway speed. The plastic brackets holding it in place sheared off. This was a known defect resulting in 70,000 recalled trucks for the prior year model (2022), but for some reason isn't covered for 2023. Same exact issue
Incident date: Jun 20, 2026
My 2019 GMC Sierra 1500 AT4 equipped with the 6.2L engine experienced an internal engine/lifter failure. The vehicle was inspected by an authorized GMC dealership. The dealership documented damaged lifters, including rough edges and visible signs of friction, and advised that the camshafts on these vehicles can also have issues. I was provided estimates for both a lifter repair and complete engine
... replacement. Due to the possibility of additional internal engine/camshaft damage and the risk of having to repeat the lifter repair, complete engine replacement was recommended. The dealership is replacing the engine with a GM remanufactured engine, part #19420611, carrying a 3-year/100,000-mile warranty. The customer-paid repair is approximately $9,400 plus applicable taxes and shop charges because my 2019 vehicle/VIN is not currently included in the existing L87 engine recall. I am submitting this complaint because NHTSA is currently investigating failures involving 6.2L L87-equipped vehicles outside the existing recall population. I believe this failure should be documented and considered as part of the investigation into whether the affected vehicle population should be expanded. I have requested the dealership provide the technician's complete diagnosis and documented cause of failure and can provide additional information when received.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