GMC Sierra Complaints (2024)

545 consumer complaints on file.

#11646855March 6, 2025
ENGINE
The contact owns a 2024 GMC Sierra 1500. The contact stated that while driving on a main road at 65 MPH, the vehicle experienced a loss of automotive power. There was no warning light illuminated. The contact coasted to a stop in the shoulder lane and allowed the vehicle to sit for several minutes before attempting to restart the vehicle; however, the vehicle failed to start. The vehicle was towed to a local dealer where the vehicle was diagnosed, and the contact was informed that the engine had seized and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 23,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11646877March 6, 2025
POWER TRAIN, ENGINE
Driving on the highway vehicle installed out in the middle of the road lucky I had enough speed to rush to the median. I heard noise coming from the engine while I was coasting off the median on the median. Try to turn on the vehicle no luck.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11646175March 4, 2025
ENGINE
Was driving approx 70 MPH when the truck lost power and put itself into neutral. Had to pull over on busy [XXX] in Missoula at 15deg F. Truck display said "restart vehicle". Once pulled over, truck put itself into PARK. Truck would not restart after multiple attempts. Was towed to dealer where they stated the engine may have seized. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645207February 27, 2025
ENGINE
Engine failed at 10,000 miles while driving down the road. No warnings, engine shut off while driving. I pulled over and contacted OnStar. They got me a tow truck to bring the truck back to the dealer the next day. I was told that I needed a new engine and they don’t know when they’re gonna get one in. It could be months. I had to pay for a Rent-A-Car out of my own pocket. The dealer would not cover the cost.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645362February 27, 2025
EXTERIOR LIGHTING
Back up camera is almost useless in very dark situations. Back up lights on vehicle wash out the view and all you can see are the red marker lines. Needs either brighter back up lights or a better camera definition. You cannot see a children's bike or other things while trying to back up.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645003February 26, 2025
ENGINE
At 14,000 miles the engine seized. Car stopped on a busy highway almost causing a collision with other vehicles
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645084February 26, 2025
UNKNOWN OR OTHER
The AC/Heat blower (fan) stopped working. The vehicle was new purchased new May 2023. August 2024 the blower motor stopped working. Took the vehicle to Jerry's GMC Weatherford, TX (where it was purchased) and they check the blower motor and replaced it. No charge for the service. Reason given for blower motor problem was, "motor shorted out, burnt the wiring and the connector". Now, February, 2025, the blower motor stopped working once again. Took it back to Jerry's GMC, Weatherfore, TX. The blower motor had shorted out once again, burnt the wires and connector. Reason given for the reaccurring problem, " the blower motors they are getting have a bearing problem, causing the motor to go to ground, overheat the wiring and burns the connector". They replaced the blower motor once again and no charge. The reason for this notice is, With these motors shorting out because of internal problems, the wiring melting and connector melting, there is the possibility of a fire hazard. We feel that there needs to an investigation into this problem before something happens. Thanks
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645168February 26, 2025
ENGINE
I am beyond frustrated with my newly purchased 2024 GMC Sierra Elevation 1500 5.3l V8. Back in November I was notified to bring my vehicle back to the dealership for a complete engine replacement. Ever since this time I have had continuous problems with the vehicle. One day after receiving my truck back, I noticed that it was running rough and misfiring. When I opened the hood, I observed a bungy cord still attached to the engine. Several weeks after, the check engine light came on and took a week to get back due to sensor issues with engine. Today, after getting off work, I turned on my truck, but I am unable to shift out of park and I am stuck waiting on a tow truck. There has been nothing but issues with this truck since they replaced the engine. I am not sure if the mechanics at Garlyn Shelton GMC in Temple, Texas, are qualified to replace engines. This is a brand new truck and I should not be having these issues. My fear is that these problems are going to continue because they either did not properly install the new engine or there are still defects.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11644813February 25, 2025
ELECTRICAL SYSTEM, LANE DEPARTURE: BLIND SPOT DETECTION
The side mirrors have spider cracked from some type of electrical issue. This is the 2nd time this happened and it burns both mirrors at the same time. The mirrors become unusable and it appears The dealer replaced them under warranty the first time and the second time they said it is out of warranty so I had to pay out of pocket.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11644523February 24, 2025
POWER TRAIN
First time it happened was on November 28th 2024 around 8pm, turned de engine on, selected the reverse gear and stepped on the gas, the reverse gear was selected but the gear didn't worked at all. I almost hit a car that was passing on the street. I out the gear on drive and got the message "reduced acceleration". I believe that is a known issue by GM's 10 speed gearbox. The car is at the dealership and they informed me by e-mail that the part transmission valve body is in a "do not sell list". I have concerns about safety because losing power on a 70miles per hour road can be dangerous and not being able to reverse is also very dangerous. There are tons of posts about it in Facebook.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11643292February 18, 2025
SERVICE BRAKES, ENGINE, ELECTRICAL SYSTEM
024 GMC Sierra 2500 Denali Ultimate, which has suffered: •Five catastrophic engine failures at highway speeds. •Total brake failure, leaving the truck unable to stop. •Severe electrical malfunctions, including flickering headlights at night. •Retaliatory actions from General Motors after I refused to waive my legal rights. I have documented proof, including GM’s own service records, emails, and a 7-minute recorded statement from GM’s highest-level technician, confirming that GM installed the wrong computer module (1500 series instead of the required 2500 series) in my truck. Additionally, I have evidence that GM executives instructed technicians to conduct diagnostics, take apart the engine, and reassemble it—but NOT repair the defect—after I refused to sign an affidavit waiving my rights. Due to these failures, I suffered a dislocated shoulder in one of the incidents, and my [XXX] daughter remains traumatized to this day. Given the immediate danger this defect poses to other GMC Sierra 2500 owners, I respectfully request that NHTSA open an investigation and consider issuing a recall before a tragedy occurs. 1. Engine Failures Since 3,000 Miles – GM’s Own Work Orders Confirm Issue Since purchasing my 2024 GMC Sierra 2500 Denali Ultimate, I have experienced five catastrophic engine failures, all occurring while traveling at highway speeds (70 mph): •The truck suddenly lost power, dropping from 70 mph to 5-10 mph within seconds. •This created an immediate risk of being rear-ended or losing control on the highway. •GM’s own service records confirm that my engine issues began at just 3,000 miles. •GM dealerships misdiagnosed the issue FOUR TIMES, returning my truck to me in an unsafe condition. •The real cause was only identified after the FIFTH failure, when a GM-certified head technician finally determined that GM had installed the wrong computer module (1500 series instead of 2500 series). This means that for months, GM knew my vehicle w INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA
Crash:
Yes
Fire:
No
Injuries:
3
Deaths:
0
#11643086February 17, 2025
POWER TRAIN
Nothing has happened so far but I believe they have an issue with the Allison transmission. When you first start off in the morning driving slow the transmission shifts hard with a thump. I've taken it in to the GMC dealership in Ft. Walton Beach, Florida and they kept the truck overnight and said everything seems to work as it should. I just traded my 2021 gmc 3500hd dually with 130k miles on it and never heard that or ever had an issue so I'm not sure what changed since then? I'm not sure what you guys can do to look into it? Thank you [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11642698February 14, 2025
POWER TRAIN, VEHICLE SPEED CONTROL
I have experienced several occurrences of unintended acceleration while operating the vehicle at low speed. Two recent examples; 1) the truck accelerated rapidly while I was driving into my garage, and 2) the truck accelerated suddenly when pulling forward out of a parking spot in the morning shortly after starting the vehicle. In all cases, a hard application of the brake pedal slowed the vehicle. I considered whether this was operator error, possibly engaging cruise control inadvertently while turning the steering wheel, but the incident this morning does not support that potential cause. I have not spoken to the dealer about this issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11642795February 14, 2025
ENGINE
6.2L V8 engine failure
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11642113February 12, 2025
STRUCTURE:BODY
Since my purchase of the vehicle Dec 2023, the tailgate opens on its own. Usually follows hitting a bump such as the rain gutter entering a store parking area. I have also had it occur while driving down the road. Have been told multiple times by my service personnel they have had same complaints from other Sierra 1500 but have no fix for the problem. They have offered to deactivate the electronic tailgate system but this is unacceptable to me. There is a recall for 2500 models with same issue but not for 1500’s. This makes little sense.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11642114February 12, 2025
POWER TRAIN, ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
I leased this vehicle on May 17, 2024, expecting it to function as intended. Instead, within months, it suffered recurring and escalating failures that have rendered it unsafe and unusable. January 7, 2025, I brought the truck to Gates GMC for routine service and reported that it had lunged forward by approximately 2 to 2.5 feet while shifting into park. Additionally, it exhibited irregular acceleration and rough down shifting in lower gears. I also communicated the check engine light has come on and gone off on the dashboard over the past week a few times without receiving any information on the app. At this January 7th visit, GM performed Recall N242435631, supposedly addressing a known battery drain defect that caused total vehicle shutdowns. On January 24, 2025, I started the truck and was immediately overwhelmed by an intense chemical odor coming through the ventilation system. January 31 – February 1, 2025 – Erratic Engine Warning Lights & Diagnostic Failures On January 31, 2025, at 5:28 PM, on this key cycle the check engine light illuminated but failed to register in the GM app. On the next key cycle, the warning disappeared. The following morning, February 1, 2025, at 10:26 AM, the check engine light Appeared on the first key cycle before disappearing on the second key cycle. The onboard diagnostics system failed to log or retain these warnings. On February 7, 2025, the vehicle suffered a complete electrical failure. no electronic function whatsoever. Roadside Assistance attempted to jump-start the truck using a high-powered jump pack, but it remained inoperable. A ford super duty and jump pack were needed to force start the truck. February 10, 2025 the truck suffered another total electrical failure and required towing to Gates GMC. The app indicated the Brake System, Anti-Lock Braking System, Emissions System (Specifically the exhaust system), and Power Train requiring service. My truck is at Gates GMC and was drawing 90 milliamps opposed to 40
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11642303February 12, 2025
POWER TRAIN
The contact owns a 2024 GMC Sierra 1500. The contact stated while driving 74 MPH, the vehicle inadvertently lost motive power, after which the vehicle was unable to accelerate above 25 MPH. The contact was able to pull over to the shoulder of the roadway and turned off the vehicle. After restarting the vehicle, the vehicle returned to normal functionality, but the failure became a regular occurrence. The check engine warning light was illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the shift solenoid valve and that the serial data gateway module needed to be reprogrammed. The vehicle was not repaired. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 24,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11642075February 11, 2025
POWER TRAIN
7500 miles and transmission valve body failed. Parts are on back order with no eta.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11642080February 11, 2025
FORWARD COLLISION AVOIDANCE: WARNINGS, LANE DEPARTURE: WARNING, LANE DEPARTURE: ASSIST
The systems have become unavailable. Took to dealership and they were told it just needed a software update. Dealer performed update GM sent and did not work. Dealer was told GM engineers would need to find a fix. I complained to GM and asked that they replace the cameras, especially because the vehicle is under warranty, and I was told no because that won't fix the issue. They don't even know what needs to be done to fix the issue though, but won't try a camera swap. They told me I need to take it back to the dealer so they can run diagnostics on it when the issue happens. I don't know what is so hard to understand that the issue is always there; the systems don't work and my dash always has the light the forward collision system not on and given a message when I start the truck that it is not available. This began to be an issue around 9000 miles. It first started by saying window camera blocked due to frost, but when it was clear, and I cleaned every camera and sensor, it still would not come on. This was 1.5 months ago. I don't understand why they are not trying to expedite fixing this safety issue. The dealer can't do anything until GM tells them to change out camera or send another fix, but there is no software fix available. I can forward emails between myself and GM and you can clearly see they are not listening. If that would be helpful, please let me know how to forward them.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11641642February 10, 2025
AIR BAGS, SEAT BELTS
While driving a new 2024 GMC Sierra SLT (13,000), I received a prompt to SERVICE SAFETY RESTRAINT SYSTEM. My airbag lamp also illuminated and is now on. Upon researching this issue, it refers to potential failure of seatbelts and/or airbags. I have an appointment tomorrow at the dealership to have them diagnose the issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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