GMC Sierra Complaints (2024)

545 consumer complaints on file.

#11718135February 15, 2026
POWER TRAIN
Truck had 3 momentary rear wheel lock ups on the highway from 41 - 52 mph.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11717814February 13, 2026
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
On 3 separate instances the past few months the truck slammed on brakes for no apparent reason. And 2 separate times the past week or so the truck suddenly and uncontrollably accelerated — first at gas a station convenience store and almost ran over old lady, secondly while waiting line on arterial entrance ramp!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11717922February 13, 2026
ENGINE, POWER TRAIN, ELECTRICAL SYSTEM
The contact owns a 2024 GMC Sierra 1500. The contact stated that while driving at 67 MPH, the transmission shifted to neutral(N) unexpectedly. In addition, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The contact attempted to drive the vehicle off the road. A passerby slowed down and allowed the contact to move over to the side of the road. The engine seized, and the vehicle stalled between the shoulder and the line of the left lane. The check engine warning light illuminated, and the messages "Battery Low" and "Reducing Features to Save Battery" were displayed on the instrument panel. The contact called a friend who towed the vehicle to the dealer. The dealer was informed that the engine had failed and needed to be replaced. The vehicle remained at the dealer unrepaired. The contact stated that due to the failure, the contact no longer felt safe while driving the vehicle. The manufacturer was notified of the failure. The failure mileage was 52,680.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11717560February 12, 2026
UNKNOWN OR OTHER, ENGINE
I own a 2024 GMC Sierra Denali Ultimate 2500HD diesel that has been out of service for 52 days due to an oil cooler / service bulletin related failure. The vehicle is under warranty. The required replacement part is on national backorder and, as of today, has not shipped. The current estimated ship date is February 17. During this time, neither the dealership nor GMC has provided proactive communication. I have had to repeatedly contact them for updates. This extended inability to repair a critical component, combined with the lack of parts availability and communication, raises concerns about the reliability of this system and the manufacturer’s ability to support safe operation of the vehicle in a reasonable timeframe. The truck is my primary vehicle and is intended for towing and transportation. Being unable to repair it for nearly two months due to parts unavailability presents a significant safety and reliability concern.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11717431February 11, 2026
ENGINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11716277February 6, 2026
ENGINE
On 5 Feb 2026 I was starting my 4-hour drive back home. 15 minutes into my drive my truck lost power, several lights and the engine light came on. Truck was sputtering and making harsh engine noises and shut off on me. I was forced to exit Loop 2 (a major highway). Once I was able to restate the truck I went straight to the dealership. This truck had the recall done 15 Oct 2025. However, this issues still occurred. The motor gave out. Truck is 83K in mileage. well under 100K. Cost estimate is $6.5K. The technician informed me that a lifter collapsed in cylinder 5. This is clearly still part of the GMC recall issue for the 6.2L engines. What is my next step in this process. If I knew there was a major issue with these Trucks, I probably would not have purchased it. All maintenance has been done with same dealership to keep all service records excess able.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11715367February 3, 2026
ELECTRICAL SYSTEM
Onstage control module fail and drains batteries leading to power failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11714631January 31, 2026
POWER TRAIN
Rear wheel lockup event in traffic while towing 24000lb 5th wheel on freeway. Vehicle was limped to a dealer, diagnosed as a transmission valve body failure. Repair took over 1 month stranding us over 1500 from home while on a trip.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713737January 27, 2026
STRUCTURE:BODY
Front grill cap blew off while driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713767January 27, 2026
SEATS
Seat is squeaking loudly like if its loose or something is loose with it dealership and gm dont want to fix it they expect me to pay to fix something that ahouldnt even be happening on a 2 year old vehicle specially when you pay more than 70,000 dollars for a vehicle to be having this issue
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713533January 27, 2026
ENGINE
Post recall L87 I had a catasrophic engine failure. 70 mph highway engine seized lost propulsion. 38000 miles. No warning, Engine has been replaced by GM
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713584January 27, 2026
ELECTRICAL SYSTEM
While driving the vehicle I hit a bump on the road and all 4 windows in the vehicle went down. I did not push any buttons. I tried to close the windows and they would not close. Nothing happened when I attempted to close them. It was 10 degrees out I pulled over, and tried again with out success. I shut the car off, opened the door and closed it and restarted the car after a few minutes. I was able to close 3 of the 4 windows. I started driving and eventually I was able to close the last window. ON my drive I late hit another bump and again all 4 windows opened with out any action by me, I was on a highway, I again pulled over and was not able to close the windows. After I continued driving I was able to close 3 of the 4 windows and eventually the 4th. This is a safety issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713307January 26, 2026
ENGINE, POWER TRAIN, VEHICLE SPEED CONTROL
While traveling 60 mph on a divided highway went to pass another vehicle. Had no throttle response the engine had completely turned off, locked up seized up. I’m not sure what caused the engine to just lose all power. Had to go back to the lane and luckily there was a turnoff where I was able to turn off the highway.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11713264January 25, 2026
STRUCTURE:BODY
I was driving on the highway (using cruise control) when the front bumper grill started vibrating (so I tried to slow down) but it kept flapping and flew off before I was able to pull over. I then pulled over on the shoulder and had to walk back to retrieve it. My safety was put at risk because it could have hit my windshield and caused me to have an accident, or, it could have hit someone or another vehicle. I have it and it is available for inspection. It has not been inspected by anyone yet. There were no warning signals prior to the failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11712299January 21, 2026
ENGINE, POWER TRAIN
2024 gmc engine 6.2 that failed had the recall test done and a couple of mounts later engine started making loud knocking sound its at the shop now getting a new engine in been at the shop for about 3 weeks now
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11712373January 21, 2026
ENGINE
Lifter failure in 5.3 liter V8 causing extended repair
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11712042January 20, 2026
ENGINE, ENGINE AND ENGINE COOLING
The contact owns a 2024 GMC Sierra 1500. The contact stated that the vehicle was included in NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling) in October 2025, and the vehicle was taken for inspection. The vehicle passed the inspection, and the recall was closed. The following month, while driving approximately 60 MPH, the vehicle started losing motive power and decelerated to approximately 30 MPH with an abnormal clanking sound coming from near the engine compartment. The contact was able to pull to the side of the road and waited before driving 30 MPH to a nearby dealer. The check engine warning light and an unknown sensor light were illuminated. The vehicle was taken to the dealer, who diagnosed that there was a loss of power due to engine failure and that the engine needed to be repaired. The engine was replaced. The manufacturer was made aware of the failure, and a case was opened. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 67,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11711471January 16, 2026
ENGINE
my truck has not been added to the 6.2 engine recall. I have several cases of friends and acquaintances who have had multiple engine failures (including replacements)with this same engine where their trucks shut down in the middle of the highway. I’ve tried speaking with GMCs customer warranty department to get details on why my engine has not been recalled and no one including them, my selling dealer or my service dealer can explain why it has not been recalled. I do not feel safe driving this truck and I’ve come to the point where I do not feel GMC has been honest with me about this engine. I’m actively reading dozens and dozens of cases each week where some GMC trucks are on their 3 or more engine. (engines produced in 2025 and late 2024). facebook page called gm 6.2l engine and bearing failure 2019-2024 discussion group has nearly 5,000 active members on it. I’m even getting conflicting information form gmc and dealers on what oil the truck should have.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11711040January 15, 2026
POWER TRAIN
The transmission made a loud noise, resulting in a sudden decrease in speed while driving in traffic. Felt similar to being rear ended in a collision. The lights came on in my dashboard including the check engine light. Tried driving the vehicle and it would shift erraticaly rendering un-driveable. Had to be towed to my GMC dealership for service. The initial diagnosis is an issue with the "valve body". a quick search on the internet presented several other users with this issue in this model truck with this transmission. The service department also seemed to be aware of the issue. If it is so widely known, why would there not be a recall placed on these vehicles? I'm glad I had already dropped my son off at school and that I was not on a Main Street where I could safely pull over and wait for the AAA driver.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11710835January 14, 2026
POWER TRAIN
Had a recall for the engine , went in for the pick scope test and it passed they switched the oil from 0w-20 to 0w-40 and not even 500 miles and the engine failed lucky I wasted driving it when it did
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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