GMC Sierra Complaints

15,732 consumer complaints on file.

#11664216June 1, 2025
ENGINE
I learned 2 weeks ago my 6.2L was part of the recall. I took a business trip in the truck with about 19,000 miles last week. I got home Friday noon. Truck was parked from Friday till this afternoon. Went to remote start it, it started, was misfiring and stalled, I could hear what I thought was a rod clanking. I got in the truck, started it with the start button, same thing. Had my 19yr old son start it with me laying on the driveway listening. It was clearly a rod or bearing making noise. I’m fortunate this happened in my driveway and not on my hour drive Friday. Truck will be towed to dealer Monday 6/2, but I suspect this motor has failed with 20,000 miles for the same reason it was recalled.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11664226June 1, 2025
POWER TRAIN
I am reporting an ongoing safety issue with my 2020 GMC Sierra 2.7L related to the transmission. On two separate occasions within the same month, my truck broke down in the middle of the street, requiring it to be towed to the dealership for service. The first time, the dealer informed me they repaired a part inside the transmission and stated the truck was fixed. However, after picking up the vehicle, the issue persisted, though not as frequently. When I called them, they advised me to drive it for another 100 miles so the valve could fill with oil and the transmission could properly recalibrate. After a few days of driving, the same issue occurred again — the truck stalled in the middle of the street, and I had to have it towed once more to the dealership. This time, the truck remained at the dealer for about a week. They replaced another part inside the transmission and returned the truck to me, noting that it only had about 40 miles of warranty remaining. I asked the dealership to extend the warranty or give me at least two months to test the truck and confirm the issue was resolved, as I am genuinely concerned for my safety and my family’s safety if the vehicle breaks down again on the road. They told me they would respond within two days, but it has now been over 10 days with no response. I am currently afraid to drive the vehicle because of the risk of it breaking down again, especially with my family inside. I am requesting that NHTSA review this issue for potential safety concerns with the transmission system in this vehicle model.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11664233June 1, 2025
ENGINE, SERVICE BRAKES, STEERING
While traveling on the interstate the vehicle lost all propulsion and started to rapidly decelerate. Shortly after propulsion was lost the engine turned off completely affecting the steering and braking of the vehicle. The vehicle was towed to the GMC dealership that we purchased it from. repairs have not begun so I assume it would be available for inspection. We were traveling on a three lane interstate up a grade at 80 MPH. Had I not been able to safely get the vehicle stopped and out of traffic or had we lost control going down a grade we would not have been able to stop the vehicle and there would've potentially been a catastrophic accident most likely resulting in injury or death. No the dealership has not diagnosed the failure physically. The service writer did suggest that it sounds like the failure reported from the recall not being addressed. I did contact the dealer about the recall on Saturday May6th. At which time I was informed there was not a solution for the vehicle for my vehicle at that time. There were no warning prior to the incident. After the engine stopped operating there was a warning produced on the instrument panel that read "Engine Oil Hot" and the instrument panel no longer registered any oil pressure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11664234June 1, 2025
ENGINE
The engine lifters failed with out notice twice. Upon inspection of the vehicle it was determined that there was no issues that contributed to this failure. I paid to have the problem fixed within a year the same problem happend again. I was on the expressway and my car just shut off with out warning while cruising at expressway speeds and refused to cut back on for about 2 hrs.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11664238June 1, 2025
VISIBILITY/WIPER
The backup camera on the new 2025 GMC Sierra 1500 AT4 is not displaying a visible picture at night. During the day time, the picture is clear. At night, you cannot see nearly anything. This is and has been widely reported online. This poses a massive safety threat to pedestrians, pets, other vehicles, and property; due to the night vision malfunction. Please make this a RECALL on GMC to prevent any catastrophic occurrences. This is unacceptable for any 2025 vehicle and the law requires all new vehicles must have backup cameras. It must be a requirement that the cameras function in BOTH day and NIGHT.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11664079May 31, 2025
ENGINE
Misfire alerts causing major motor repairs
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11664081May 31, 2025
POWER TRAIN
Reached the 100,000 mile mark and the truck started shuddering. Took it to the dealership and they tell me the torque converter is coming apart and I need a new transmission.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11664133May 31, 2025
UNKNOWN OR OTHER
Dash board is cracking in various places even after being repaired. Concerned that it could disintegrate sending plastic pieces flying in an accident or air bag deployment.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11664059May 31, 2025
POWER TRAIN
Vehicle jolts forward when coming to a complete stop causing vehicle to move forward unintentionally.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11664061May 31, 2025
AIR BAGS
Air bags did not deploy when another vehicle hit truck on front passenger side at 35-40 mph
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11663930May 30, 2025
POWER TRAIN
front idler gear for the transmission pump failed at 39500 miles. was fixed under GMC warranty. but now after getting the truck back the transmission has extremely harsh down shifts. still waiting for GM to figure out what to do next..
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11663942May 30, 2025
POWER TRAIN
The contact owns a 2023 GMC Sierra 2500. The contact stated while driving approximately 40 MPH, the vehicle shook abnormally twice and then switched to Low Power Mode. The contact stated there was no warning light illuminated. The contact had the vehicle towed to a local dealer, where it was diagnosed and determined that the transmission valve body needed to be replaced. The contact stated that the valve body had failed within one and a half year. The contact requested that the entire transmission be replaced. The manufacturer was informed of the failure and declined to replace the transmission. The vehicle was not repaired. The failure mileage was approximately 42,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11663953May 30, 2025
ELECTRICAL SYSTEM
Tailgate automatically opens while driving or in park tailgate fell down on its own and hit garage door causing a scratch scrape of paint vehicle only has 46000 miles this part should not have gone bad already and why was this year not on the recall should not have to pay for part and labor on a 3 yr old truck bad business... Onstar module went bad GMC truck only 3 yrs old should not have to pay for part and labor and installation on a new module this failure should be covered by gm as it there fualty part on a new vehicle bad business
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11663965May 30, 2025
SERVICE BRAKES
The brakes on my GMC Sierra 1500 lose braking power when operating at slow speeds. The brake pedal will lose braking power, causing the vehicle to not stop at slow speeds. This is particularly troubling when pulling into and out of parking spots, driveways, crosswalks, and other areas. I use my truck to pull a boat and when I back my boat into the water at a boat launch, the brakes will lose power when I am in reverse causing the truck to slid into the water.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11663971May 30, 2025
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
The active cruise control does not appear to be able to be completely turned off, you can only cancel a particular speed you have set. I have experienced multiple times in a parking lot situation when trying to park that as steering wheel was spinning, it is very easy to hit the toggle switch that sets/resumes the cruise control, at that point vehicle may acclerate to the set point as you are trying to park. You must quickly either hit the cancel button or the brake to disengage the cruise control that you have no intention of engaging. Although I have been able to get the situation under control, had another moving car or pedestrian been close by, not sure if I would have same result. I have gone through the operating manual provided with the vehicle, and from what I can tell, there is nothing in the manual that even tells you how to operate the active cruise control. It seems like there needs a “system off switch” so the set/resume button is not active, until the system is turned on. I have owned many GMC Products, and none have had the design where the toggle switch sticks out from the steering wheel and is easily inadvertently engaged. Usually the controls are flat/smooth like the “cancel” button on this vehicle…….which can’t easily be engaged accidentally. Luckly, I have not had a crash or injured a pedestrian
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11663985May 30, 2025
POWER TRAIN, ENGINE
The coolant control valve is defective and the part is on back order with GM and dealer can’t tell me when part will be available because General Motors doesn’t know. Dealer has had my vehicle for three weeks and because of GM can’t tell me anything new.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11664010May 30, 2025
POWER TRAIN, ENGINE
My truck has a known recall from GMC which results in total loss of propulsion. It has not failed yet, but this is dangerous to me, my family/kids, and potentially others on the road. I have made multiple attempts to speak with GMC about the issue and also my local dealer. Neither group will provide concrete information as to when they can look at/service my truck even though there is a known remedy - [XXX] I brought my car into the dealer December of 2024 for brakes and also a rattling noise since it was uncharacteristic. Noises can be indicative of this larger problem (which I know now and didn't then) but they "didn't hear a rattle" and the "condition could not be duplicated" which is patently false since it still makes the noise/has gotten worse. Since then, I have taken the following actions: - I called and spoke with the local dealer service team on 5/5 - was told since it's showing incomplete, no remedy available there was nothing they could do - Spoke with GMC on 5/5 - they directed me to the local dealership - Made an appointment online on 5/10 to get my truck serviced and to check for this problem - They immediately called me first thing on Monday 5/12 to cancel my appointment and again tell me there is nothing they can do about this issue - I have continued to express my safety concerns to both parties - I spoke to GMC today, 5/30 and was told that there is no timeline for the issue (with my VIN) even though the remedy is known - An appointment is scheduled on 6/12 with my local dealership, but if I recall status hasn't changed, they will not check for this problem 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
#11664044May 30, 2025
SERVICE BRAKES, STEERING
Experienced loss of power steering, loss of brakes
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11663591May 29, 2025
ENGINE
My 5.3 engine spun a bearing on the crank. Same exact problem the 6.2 got recalled for. Now if I put a used engine in it’ll cost me around $6,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11663601May 29, 2025
POWER TRAIN, ENGINE, UNKNOWN OR OTHER
TRANSMISSION SHURTTING, JERKS, AND VIBRATION, BAD TORQUE CONVERTER BUBBLE AND PELLING PAINT. IT FEEL LIKES ENGINE IS LOSSING POWER
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

← Back to GMC Sierra