Consumer Safety Complaints

Incident date: Jan 17, 2026

In 2023, the vehicle began exhibiting erratic transmission shifting behavior, including harsh and unpredictable shifts while driving. The vehicle was taken to a GMC dealer for diagnosis and repair. Recently, the vehicle developed additional drivetrain and engine control issues related to the crankshaft position sensor circuit. The vehicle stalled while driving on a highway mountain overpass with... Read more

Incident date: Feb 2, 2026

My truck started knocking and while driving home and it died on me in the middle of a busy street and would not start. I waved down a police officer and he kept me safe from cars hitting from behind.Come to find out it was the bearing rod and now I’m getting my engine replaced. My truck is a 2024 gmc sierra with 9,000 miles on it.

Incident date: Feb 5, 2026

Dear Sir/Madam, For the 3rd time now, my transmission is being rebuilt. After purchasing it from the dealership and it was still under warranty GMC Bakersfield rebuilt the transmission, then again in 2020 at 119,000 miles it broke down again and All Automatic in Bakersfield rebuilt it for $3500 and now here it is 2026 and only 60.000 miles later again All Automatic is having to rebuilt the tran... Read more

Incident date: Feb 5, 2026

Dear Sir/Madam, For the 3rd time now, my transmission is being rebuilt. After purchasing it from the dealership and it was still under warranty GMC Bakersfield rebuilt the transmission, then again in 2020 at 119,000 miles it broke down again and All Automatic in Bakersfield rebuilt it for $3500 and now here it is 2026 and only 60.000 miles later again All Automatic is having to rebuilt the tran... Read more

Incident date: Feb 10, 2026

I am writing to formally express my dissatisfaction regarding a significant safety and reliability issue with my 2020 GMC Denali. Specifically, the vehicle is experiencing premature wear and imminent failure of the front ball joints. I expect the suspension components of a premium Denali-trim vehicle to last significantly longer than the 37,061 miles currently on my odometer. Industry standards ty... Read more

Incident date: Jan 30, 2026

POST-RECALL 25V274 ( & EA25007, EA25001) EXHAUST INTRUSION WITH CARBON MONOXIDE POISONING HAZARD Following the complete engine replacement under GM recall N252494000, my vehicle has developed a severe and persistent exhaust intrusion that allows toxic exhaust fumes, including carbon monoxide (CO), to enter the passenger cabin. CO levels have measured a peak of 83 PPM and consistent reading between... Read more

6 injured

Incident date: Jan 30, 2026

POST-RECALL 25V274 ( & EA25007, EA25001) EXHAUST INTRUSION WITH CARBON MONOXIDE POISONING HAZARD Following the complete engine replacement under GM recall N252494000, my vehicle has developed a severe and persistent exhaust intrusion that allows toxic exhaust fumes, including carbon monoxide (CO), to enter the passenger cabin. CO levels have measured a peak of 83 PPM and consistent reading between... Read more

6 injured

Incident date: Jan 30, 2026

My vehicle has been in 16 times since I bought it the most recent incident is for the engine which started about six months ago. It’s been in since then for other issues concurrently with this one it hesitates like it’s getting stuck in sand before it wants to go first the mechanic told me he didn’t sense it but the thermostat was stuck open so they fix that. Second time it went in they thou... Read more

Incident date: Jan 30, 2026

My vehicle has been in 16 times since I bought it the most recent incident is for the engine which started about six months ago. It’s been in since then for other issues concurrently with this one it hesitates like it’s getting stuck in sand before it wants to go first the mechanic told me he didn’t sense it but the thermostat was stuck open so they fix that. Second time it went in they thou... Read more

Incident date: Jan 30, 2026

My vehicle has been in 16 times since I bought it the most recent incident is for the engine which started about six months ago. It’s been in since then for other issues concurrently with this one it hesitates like it’s getting stuck in sand before it wants to go first the mechanic told me he didn’t sense it but the thermostat was stuck open so they fix that. Second time it went in they thou... Read more

Incident date: Feb 11, 2026

I am driving a 2019 GMC Terrain SLT, and I have a serious concern regarding a recent service experience. On 02/10/2026, I had an oil change and a complete vehicle inspection performed at Kunes GMC Greenfield, Wisconsin. After the service was completed and I returned home, I noticed an unusual noise coming from under the engine hood. I immediately went back to the dealership and informed them of t... Read more

Incident date: Feb 11, 2026

I am driving a 2019 GMC Terrain SLT, and I have a serious concern regarding a recent service experience. On 02/10/2026, I had an oil change and a complete vehicle inspection performed at Kunes GMC Greenfield, Wisconsin. After the service was completed and I returned home, I noticed an unusual noise coming from under the engine hood. I immediately went back to the dealership and informed them of t... Read more

Incident date: Jan 4, 2026

This letter serves as a formal notice of concern and demand for accountability regarding the 2009 GMC Sierra LD, VIN [XXX] , owned by [XXX] . There are numerous documented complaints and safety investigations concerning premature tie rod failure in 2009 GMC Sierra models. While the 2009 model year may not have been subject to a sweeping, industry-wide recall specific to tie rods in the 1500 serie... Read more

Incident date: Feb 11, 2026

Thermostat Issue (Steering Assist is Reduced Drive with Care) have changed this sensor 3 times in the past 3 years, there is no excuse for that. The emergency braking almost cause me and my daughter to be hit by a train when my car emergency braked while going over train tracks. this is unexcusable

Incident date: Feb 11, 2026

Thermostat Issue (Steering Assist is Reduced Drive with Care) have changed this sensor 3 times in the past 3 years, there is no excuse for that. The emergency braking almost cause me and my daughter to be hit by a train when my car emergency braked while going over train tracks. this is unexcusable

Incident date: Feb 11, 2026

Thermostat Issue (Steering Assist is Reduced Drive with Care) have changed this sensor 3 times in the past 3 years, there is no excuse for that. The emergency braking almost cause me and my daughter to be hit by a train when my car emergency braked while going over train tracks. this is unexcusable

Incident date: Jan 16, 2026

The contact owns a 2014 GMC Acadia. The contact stated that while driving approximately 20 MPH, the transmission shifted from 2nd gear to 3rd gear, and the vehicle shuddered before shifting. The failure also occurred while shifting from 4th gear to 5th gear. The contact ran a diagnostic scan and retrieved information for a loss of communication between the TCM and BCM. The failure was intermittent... Read more

Incident date: Feb 6, 2026

engine recall 6.2 L-87 , after Pico scoop Test, which my truck passed, its using 2 plus quarts of oil per 1000 miles, the dealer has it and is saying they can find nothing wrong per the gm tech that is telling them to check this and that. Ok, oil is going somewhere, I want the motor replaced , they want to continue the oil consumption test, my thing is wasting my time to continue driving and brin... Read more

Incident date: Feb 10, 2026

2/10/26. Driving down the highway behind a truck and horse trailer at 60 mph, electric brake system stopped working, couldn't stop, a turn lane saved me from rear ending the horse trailer. I thought i was going to die and kill or injure animals and people in my path. Police came and tow truck. 2/10/26 Vehicle was towed to the closest GMC dealer. MERIT GMC Duncan, Ok Vehicle is at service depart... Read more

Incident date: Dec 6, 2025

Engine failure without any warning. Car maintenance was kept up-to-date.

Incident date: Feb 4, 2026

Parts # 84733196 Harness ASM-TRAS CONT WRG and 84955379 SWITCH ASM-TRNS CONT have been replaced three times. This is described by dealer as a faulty PARK SWITCH. When this switch fails the vehicle is unable to be shifted to park. Vehicle needed to be located in a level position, wheels chocked and battery disconnected to safely disable the vehicle. Dealership and General Motors has been made awa... Read more

Incident date: Jan 11, 2023

The contact owns a 2021 GMC Yukon. The contact stated that while shifted into drive(D), the accelerator pedal was depressed, and the vehicle lost motive power, and several unknown warning lights were illuminated. The contact stated that the check engine, stability control, and several other warning lights were illuminated. The contact stated that the vehicle was making abnormal whining sounds, and... Read more

Incident date: Feb 9, 2026

Loss of power steering. This is a known problem with the 2015 GMC Canyon models. My 2016 GMC Canyon has the same problem. This is a serious issue. A recall should be issued. It has happened to me several times.

Incident date: Feb 10, 2026

While driving on Interstate 10 at 70 mph the upper section of the front grille broke off. After the part broke off it contacted my windshield before continuing to fly off behind him. Not only putting me in danger but also anyone traveling behind me. From online research the is a recall for this truck except the 2022 models after the same thing happening.

Incident date: Oct 29, 2025

I own a 2021 GMC Yukon Denali XL with approximately 81,000 miles. On 4 separate occasions, after coming to a complete stop in traffic and then attempting to accelerate, the vehicle violently jerks and shifts itself into park. I am not pressing the brake when this occurs. I must manually shift the vehicle back into drive in order to continue moving. This happens so fast, that I am only able to see... Read more

Incident date: Feb 7, 2026

Driving normally. Stopped at a red light when the car started to touch idle and proceeded to shut off. Tried to restart the car and when ignition button was pressed the screen and all electronics shut off and there was smoke coming from the engine bay. Police were called and the car was towed to the nearest gmc dealer. Was called today 2/10/2026 with the update that it was going to require a new m... Read more

Incident date: Nov 30, 2025

Had vehicles looked at twice and serviced once for the transmission slipping. No issues were found when looked at and light was deleted. Took to another mechanic who drained and refilled transmission. Transmission still slips after service. This happens at acceleration and continues til 3rd gears where it jerks in between gears. Stops while driving continuously, the starts up again if stopped for ... Read more

Incident date: Jan 19, 2026

My truck supposedly passed the initial recall for the 6.2L GM engines. AT THIS TIME THEY CHANGED THE OIL AND SAID THE ENGINE WAS FINE! 5 months and one oil change (performed at the same GM dealership using the new recommended oil) my engine seized up while driving approximately 55 mph in rush hour traffic. The engine made a banging and clanging noise and lost power approximately 1/4 miles after ... Read more

Incident date: Feb 9, 2026

Drastically reduced power on highway resulting in reduced acceleration due to code P0198 engine coolant control valve position sensor. Required me to drive at reduced speed on highway to get to dealer. Safety issue.

Incident date: Feb 3, 2026

The contact owns a 2012 GMC Yukon. The contact stated that years ago, the engine was replaced with a rebuilt engine. Recently, after starting the vehicle, there was an abnormal banging sound coming from the engine. The banging sound continued, and the vehicle shut off without warning. Due to the failure, the vehicle was towed to an independent mechanic, and it was discovered that an engine bearing... Read more

Incident date: Feb 2, 2026

At 22,000 miles I experienced issues while driving on a 150 mile trip. We frequently take this particular drive. We choose to driver later in the evening to miss commuter traffic. This even we pull over for a late dinner and hear a loud ticking noise while the the truck seems to lose power. I turn the vehicle off and start it again and its worse, it barely idols and shuts down. I'm in a parking l... Read more

Incident date: Dec 29, 2025

On Star module quit working in our Yukon, which in turn makes it useless to have any of the safety features. On Star and GM know this is an ongoing problem, but no recall has been issued. Neither company will repair unless an $1100 fee is paid. Why install On Star if you know it will malfunction. Since there is a monthly service fee I think they need to make sure the vehicle has the correct p... Read more

Incident date: Jan 20, 2026

The contact owns a 2015 GMC Sierra 1500. The contact stated that while at a complete stop and attempting to shift into reverse(R), Drive(D) or park(P), the gear shifter was stuck, and the contact had to go underneath the vehicle to move the shifter cable into the intended gear. The vehicle was taken to an independent mechanic, where the upper and lower shifter cables were replaced. The contact sta... Read more

Incident date: Dec 28, 2023

The engine has been burning oil since purchased but really highlighted when at 47k miles I got a dashboard message saying “reducing power to engine” I checked the oil and it didn’t register in dipstick. I added 3quarts of oil to show up on dipstick. When I changed the oil which I did at my own garage only 2.5qrt came out including what was in filter. It’s since take an average of 2.5qrt b... Read more

Incident date: Dec 28, 2023

The engine has been burning oil since purchased but really highlighted when at 47k miles I got a dashboard message saying “reducing power to engine” I checked the oil and it didn’t register in dipstick. I added 3quarts of oil to show up on dipstick. When I changed the oil which I did at my own garage only 2.5qrt came out including what was in filter. It’s since take an average of 2.5qrt b... Read more

Incident date: Jan 26, 2026

Vehicle experiences multiple simultaneous failures including “Steering Assist Reduced / Drive With Care” warning, extremely loud cooling fan operation, temperature gauge not functioning, tire pressure monitoring system failure, and widespread electrical issues (windows, mirrors, infotainment delay). Issues occurred together and are consistent with numerous owner reports for 2019 GMC Acadia mod... Read more

Incident date: Jan 26, 2026

Vehicle experiences multiple simultaneous failures including “Steering Assist Reduced / Drive With Care” warning, extremely loud cooling fan operation, temperature gauge not functioning, tire pressure monitoring system failure, and widespread electrical issues (windows, mirrors, infotainment delay). Issues occurred together and are consistent with numerous owner reports for 2019 GMC Acadia mod... Read more

Incident date: Jan 26, 2026

Vehicle experiences multiple simultaneous failures including “Steering Assist Reduced / Drive With Care” warning, extremely loud cooling fan operation, temperature gauge not functioning, tire pressure monitoring system failure, and widespread electrical issues (windows, mirrors, infotainment delay). Issues occurred together and are consistent with numerous owner reports for 2019 GMC Acadia mod... Read more

Incident date: Sep 26, 2025

The contact owns a 2022 GMC Yukon. The contact stated that the vehicle was consuming an excessive amount of oil. The vehicle was taken to the dealer, where it was diagnosed, and metal shavings were found in the engine oil. The dealer replaced the camshaft and lifters; however, the failure worsened. The contact stated while driving approximately 65-70 MPH, the vehicle stalled and lost power steerin... Read more

Incident date: Sep 26, 2025

The contact owns a 2022 GMC Yukon. The contact stated that the vehicle was consuming an excessive amount of oil. The vehicle was taken to the dealer, where it was diagnosed, and metal shavings were found in the engine oil. The dealer replaced the camshaft and lifters; however, the failure worsened. The contact stated while driving approximately 65-70 MPH, the vehicle stalled and lost power steerin... Read more

Incident date: Feb 2, 2026

Rear camera for in cabin rear view is improperly sealed for cold weather and constantly fogs which renders the camera worthless. I was also sent brand new side lights from gm that were improperly sealed and built condensation them after a month or two.

Incident date: Jan 30, 2026

On [XXX], I was driving on the highway with my family in the vehicle and the check engine light came on, then it started running roughly. I headed off the highway on an exit ramp and the engine died about halfway down the ramp. It wouldn't restart after that. This happened about an hour away from my house in Painesville, OH. I live in Erie, PA. I had to tow it to the nearest GMC dealer. They... Read more

Incident date: Feb 6, 2026

I am submitting this complaint to report a safety defect involving a 2026 GMC Yukon XL AT4 equipped with the GM Brembo brake upgrade. The vehicle is sold as equipped with a full-size spare tire; however, the spare tire/wheel supplied cannot be mounted due to interference from the brake calipers. This incompatibility was discovered only after a flat tire event on [XXX], during which the vehicle co... Read more

Incident date: Oct 20, 2025

The 3.0L diesel motor failed around 5700 miles. The thrust bearing failed and the engine and the turbo needed to be replaced.

Incident date: Oct 1, 2025

Unknown

Incident date: Oct 1, 2025

Unknown

Incident date: Oct 1, 2025

Unknown

Incident date: Feb 7, 2026

Warning message appeared stating "service brake assist" and "service ESC". Took vehicle to dealer, they found faulty Master Cylinder. Multiple parts involved, some on back order, could take weeks to a month or more for repair. Vehicle is less than 1 year in service with approx. 6k miles.

Incident date: Jan 19, 2026

Purchased brand new vehicle 2026 XL Denali, hadn’t even had my first oil change, and had a complete engine failure in the middle of the road. Prior to engine failure, car ran fine without an issue - so failure came out of nowhere. Towed, where GMC and dealer determined entire engine needed to be replaced. GMC did cover and dealer did install a new engine. However: 1. I was out of a vehicle for... Read more

Incident date: Jan 5, 2026

On 12/22/2025 I took my 2023 GMC Yukon in for the L87 recall. After receiving information that my vehicle passed the recall they told me that the oil would be change to from OW-20 to OW-40 and that my oil changes would go up in price (double the price) due to the oil being a high performance oil. On 01/05/26 exactly two weeks and 616 miles later our engine and lights completely stopped working whi... Read more