GMC Sierra Complaints

15,732 consumer complaints on file.

#11648472March 15, 2025
ENGINE, SERVICE BRAKES, STRUCTURE:BODY
Complete engine failure. Replaced engine in February of 2024. Multiple transmission issues. Grill completely peeling off.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648300March 14, 2025
POWER TRAIN
Greetings. In December 2024, I brought my vehicle in for the rear end lock up recall. The recall reprogrammed the transmission control module. As admitted, by yourself and GM this doesn't fix the problem. In addition, if the lockup occurs and a new valve body is required, GM is on back order with no date for delivery. Also, it is replacing it with the same valve body, i.e. you will have the same problem in the future. Nextgen Drivetrain has a valve body for around $1000 that fixes the problem. [XXX] . Please read the attached blog from Nextgen, they explain in detail, the problems and the fixes. I am scared to death to pull my travel trailer out of state with this looming problem. Please give us a better solution. Thank you. 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
#11648325March 14, 2025
POWER TRAIN
2023 GMC Sierra 2500 AT4 with approximately 36,000 miles as of current. The vehicle has experienced three valve body failures to date. GMC dealerships have completed one GM remanufactured transmission replacement and an overhaul of the second transmission. The third valve body has now failed. A GMC transmission specialist confirmed transmission failure upon recent test drive on 2/24/2025. GMC dealership refuses to perform warranty repair as they are stating “a recall is being developed” therefore will not repair/replace current defective powertrain parts. I was given the vehicle back with the verbal disclaimer “it should be safe to drive but the rear wheels can lock up at highway speed so be aware.” The failure causes extreme harsh downshifting and what feels like a momentary rear wheel lock up. I have experienced this numerous times at lower speeds (<40mph). The check engine light does not come on.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648347March 14, 2025
ENGINE
On Saturday March 1st I was driving East on I-10 in Florida when my trucks engine lost power. I managed to get over onto the shoulder of the road and got out of the flow of traffic. Very scared I was going to get hit before I could get off the interstate. Motor was making a terrible noise like the lifters let go. I was beside the interstate for about 3 hours trying to find a tow truck to come get me and the truck off the side of the interstate. I had the truck towed for about 60 mile to get it back home to the dealership. The truck has 26,000 miles on it and the dealership told me the motor was no good and that there is metal pieces in the oil pan. 2 weeks have past by and they can't tell me when they will receive a replacement motor. What am I supposed to do? $80,000 truck 2 years old and the motor is no good. Thanks
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648405March 14, 2025
FUEL/PROPULSION SYSTEM
Def heater connection on the tank will arc and melt down causing engine derate and costly repairs. Gm know and has released a service bulletins in 2022. Bulletins N212342980. But even with bulletins done still fails. And talking todealer ships it a very common problem and there is a shortage in parts.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648413March 14, 2025
POWER TRAIN, ENGINE, SERVICE BRAKES
-Transmission valve body Failure, Wheel lock up, ABS Event, Loud Bang and a Flashing "D" on Driver Information Center (DIC) when Lightly or Moderately Accelerating Forcing an 8-7 or 8-6 Downshift -When all four tires lock up at a high rate of speed, this puts the driver, the passengers, and all others on the road at risk for injury or death. -Yes, the problem has been found in a document by my local dealer that this issue was added to my exact vehicle's service manual on 11/27/24. The document describes in detail the exact scenario I have been involved in multiple times. It is deemed as #21-NA-275. It locks up the tires randomly to the vehicle in mid acceleration at any speed including 80 miles per hour in one instance for me. -Yes, the dealership inspected it and found the issue to correlate with the newly added section to the service manual, 13333166. This document ID is 5925530 and the added information to the dealership is #21-NA-275. The GMC manufacturer has been contacted as of 3PM MST 3/14/25. Insurance doesn't deal with mechanical problems. The police will only be involved when there is death or injury. -No. The only warning that happens is simultaneously as the vehicle locks up the tires causing the driver (me) to inevitably try to save myself and others, swerving and trying to focus on not hurting myself or others but I did notice the "D" flash on one of these occasions. This is the most dangerous issue with a vehicle I have ever even considered. At any time, for any reason, all four tires can lock up at any rate of speed and cause multiple casualties. The way to fix this is to spend $3,000 which I am sure many people like myself do not have. This means there are thousands of these exact make and models of vehicles on the road right now. Please do not take this lightly as I have almost crashed multiple times with people in my vehicle due to no fault of my own.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648044March 13, 2025
ENGINE, ELECTRICAL SYSTEM
The contact owns a 2022 GMC Sierra 1500. The contact stated that the vehicle failed to immediately start with the message "Battery and Key fob" failure displayed. The battery and key fob were replaced; however, but the failure persisted. The vehicle was taken to the local dealer who diagnosed that the engine was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure. The failure mileage was 36,000. The VIN was not available.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648066March 13, 2025
POWER TRAIN
DEF tank heater, diesel exhaust fluid heater has failed which causes the truck to go into a reduced speed until fixed. GM has no parts to fix the issue! at my dealer. Currently there is three or four trucks waiting on the exact same part, it puts the truck into reduced power and speed until part is replaced
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648068March 13, 2025
POWER TRAIN
The contact owns a 2020 GMC Sierra 1500. The contact stated while accelerating from a complete stop, the vehicle lunged forward. The contact stated that the failure recurred while driving at various speeds depressing the accelerator pedal, and while decelerating to come to a complete stop. The check engine warning light was illuminated. Additionally, the contact stated that while coming to a complete stop at a traffic light, the vehicle lunged forward violently, as if the vehicle had been rear-ended. The vehicle was taken to Quality Plus Automotive, where it was diagnosed that the transmission had failed and needed to be replaced. The local dealer, Leith GMC (919) 366-1000), and other dealers were contacted and informed the contact that an estimate for the repair could not be provided because the transmission part was not available. The vehicle was repaired by Quality Plus Automotive. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 75,450.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648167March 13, 2025
EXTERIOR LIGHTING
The reverse lights don’t illuminate camera when you’re in a dark parking lot or area. If and when camera is relied on for reverse, you wouldn’t be able to see a person or anything else. It’s a lighting problem. When you are in an area that is lit (dealer parking lot) you can see fine. I also own a 2014 Chevrolet and camera works fine in dark and lit areas.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648198March 13, 2025
VEHICLE SPEED CONTROL, ENGINE, STRUCTURE:BODY
1.During December 2024, noticed the wrap or called grill part at the back of the truck detached 2.On 5th February, got a warning :reduce acceleration with caution, when I pressed gas pedal, could not go faster than 35mph, the truck was shaking really hard. It has been in the dealership waiting for valve body until today 13th March, still no idea when it will be fixed
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648242March 13, 2025
POWER TRAIN
Hard shifting. Back wheels locking up
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647809March 12, 2025
ENGINE
I own a 2023 GMC Sierra 1500 Denali Ultimate. The truck had about 19k miles on it when the engine seized while driving on the highway late at night in January. This was extremely dangerous as I was going 55mph over a bridge and lost the engine. I was stranded on an exit ramp unable to move. It was cold that week so it was 5 degrees. Onstar informed me that since the truck could not be shifted into Neutral that it would need dollies and a flat bed. They said they could get to me at 8am which was 9 hours from when the truck broke down. It was 5 degrees out and I had no heat sitting on the highway. I ended up calling a local tow company and they were able to get to me but I had to wait 3 hours. The truck was towed to the deal and they confirmed that the engine seized (it is a known problem) and it needs a new motor. They said there is a big back log of engines because many have this issue. I still have not provided a timeline for the truck to be repaired.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647920March 12, 2025
ENGINE
The passenger side lifters in my truck failed while at idle/5mph speed causing catastrophic engine failure. 2019 6.2L V8 from GM. From my own independent research, and the research/survey of others online, this appears to be a very common problem as a result of known defective parts that were installed on GM engines.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647948March 12, 2025
ENGINE
I was driving 50mph when my check engine light started flashing. The engine had very little power and there was a new consistent engine knock. I took to GMC dealership and they informed me that half of the engine lifters failed and a pushrod was bent. There was no warning prior to the incident. I have had the vehicle serviced only at the dealership and have only used premium fuel. The truck has 88,000 miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647961March 12, 2025
ELECTRICAL SYSTEM, ENGINE, POWER TRAIN
[XXX], I PURCHASED A 2021 GMC SIERRA 1500 FROM FAULKNER CHEVROLET IN BETHLEHEM, PA. I TEST DROVE THE VEHICLE BEFORE PURCHASE AND IT SHOWED NO INDICATION OF ANY MECHANICAL ISSUES THAT I WAS ABLE TO DETECT. I WAS SHOWN BY THE DEALERSHIP THE CARFAX AND WAS INFORMED THAT THERE ARE CURRENTLY NO RECALLS FOR THE VEHICLE. I WAS LED TO BELIEVE THAT THE VEHICLE WAS IN GOOD CONDITION AND SAFE TO DRIVE AND, THEREFORE, AGREED TO PURCHASE THE VEHICLE FOR THE AFOREMENTIONED PRICE (INCLUDING TAX AND TITLE FEES). I PURCHASED THE VEHICLE WITH 60,077 MILES ON IT, AND AFTER DRIVING IT NORMALLY FOR ONLY 5 DAYS (ON [XXX]) IT BROKE DOWN AND I WAS STRANDED ON THE HIGHWAY 16 HOURS FROM HOME. I WAS ABLE TO GET THE VEHICLE TOWED AND PAID $1,200 FOR THE STARTER TO BE REPLACED, WHICH IS WHAT THE MECHANIC SUGGESTED BUT THIS ENDED UP BEING ENTIRELY UNNECESSARY AS THE REAL ISSUE WAS DUE TO A CATASTROPHIC DEFECT IN THE ENGINE. AFTER THE STARTER WAS REPLACED, I WAS DRIVING THE VEHICLE ONLY A FEW DAYS LATER (ON [XXX]) AND IT SUFFERED A CATASTROPHIC ENGINE FAILURE WHILE DRIVING 70MPH ON THE HIGHWAY. I LOST CONTROL OF THE VEHICLE AND NEARLY GOT IN A COLLISION WITH ANOTHER VEHICLE. I WAS ABLE TO GET THE VEHICLE TO THE NEAREST AUTO SHOP AND AFTER INSPECTING THE VEHICLE THEY INFORMED ME THAT THERE IS A SERIOUS ENGINE ISSUE RELATING TO A SEIZED BEARING AND THE ENGINE WILL NEED TO BE REBUILT ENTIRELY. AT THIS POINT IT HAD BEEN ONLY 12 DAYS SINCE THE PURCHASE AND THE ODEMETER READ 61,662 (1,585 MILES DRIVEN SINCE PURCHASE). DUE TO THE FAULTY VEHICLE, I WAS FORCED TO PAY TO HAVE THE VEHICLE SHIPPED FROM THE LOCATION WHERE IT BROKE DOWN TO THE DEALERSHIP WHERE I ORIGINALLY BOUGHT IT (AROUND $1,200). FAULKNER CHEVROLET KNOWINGLY SOLD ME AN UNSAFE VEHICLE THAT THEY WERE WELL AWARE HAD A DEFECTIVE 6.2L V8 ENGINE. THIS DEFECT IS CURRENTLY UNDER INVESTIGATION BY THE NHTSA AND FAULKNER CHEVROLET PURPOSEFULLY OMMITTED THIS CRUCIAL INFORMATION UNTIL AFTER THE VEHICLE WAS SOLD. CLEARLY, THIS IS AN UNETHICAL BUS INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORM
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11648007March 12, 2025
STRUCTURE:BODY, ELECTRICAL SYSTEM
Tailgate opened/unlocked while parked during rain and light snow. The tonneau cover disguised that the tailgate was open (held it up just enough so it was not visable). The tailgate fell open while driving but went unnoticed. Several large and expensive items were lost out of the back of the truck which is used as a work truck for electrical services. This has happened twice on the roads. Now the tailgate is physically checked before driving to ensure it will not fall open. The incident was mentioned to the local GM dealer but we were told our model was not part of the recall. Our next call will be to GM directly to try to remedy the problem and hopefully recoup the items lost.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647578March 11, 2025
ENGINE
Lifters failed and damaged engine at 68000 miles
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647635March 11, 2025
ENGINE
Catastrophic Engine Failure
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11647668March 11, 2025
ELECTRICAL SYSTEM, ENGINE, POWER TRAIN
While attempting to accelerate to get onto the expressway with no warning, the vehicle went into limp mode. Traction control, front end warning collision, auto/stop start functionality was all disabled and the engine light warning light on came on. The vehicle locked out and reduced acceleration. An attempt to pull over and turn the vehicle off for a few seconds was made. Once restarted, the vehicle continued running on limp mode at reduced speeds with the same indicators mentioned still disabled and locked out.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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