Which parts fail
Components named in complaints (automatic and manual transmissions, CVT, axles, driveshaft, 4WD/AWD).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2014 GMC Sierra 1500 owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving at various speeds, the vehicle was veering to the right or to the left and was moving upwards and downwards. Additionally, the contact stated that the vehicle was veering excessively to the left or to the right while turning. The vehicle was taken to an independent mechanic, where the front brakes were replaced, and the contact was informed that the sway bar end links were fractured due to rust. The contact stated that upon inspecting underneath the vehicle, the lower parts of the links had detached, and one of the links was flapping. The contact purchased new parts from the dealer, and the mechanic replaced the links. Additionally, the contact stated that the vehicle was experiencing hard shifts while driving from a complete stop and while coming to a stop. The vehicle was repaired. …
I was driving around a lake with my family. We were fishing. I had no warning at all and my transmission started to sputter and jerk extremely bad and my brakes did not work at the same time. I had to use my parking break to stop my family and I from going into the lake at 40mph. I looked up on many websites and forums and saw multiple people with the same issue. I am afraid that this will happen to a young driver and it be very tragic. Please do a recall. My truck is still sitting at my house broken. I am on disability and can not afford to fix it. I just keep paying my payments with no use of my truck. Please I beg of you.
The contact owns a 2014 GMC Sierra 1500. The contact stated while his wife was driving approximately 65 MPH, the vehicle began to vibrate and made loud grinding sounds. The contact stated that the vehicle began to lose motive power. The contact's wife was able to exit the highway; however, the transmission was slipping out of gear. The contact stated no warning light was illuminated. The contact stated that the failure had become constant. The vehicle was not taken to a local dealer or independent mechanic to be diagnosed or repaired. The manufacturer had not been informed of the failure. The failure mileage was 94,302.
The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle jerked and pulled to the right. No warning lights were illuminated. In addition, the contact stated that while driving over a bump in the road, the vehicle lost automotive power and shut off. The contact restarted the vehicle. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 230,000.
The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving on several occasions at speeds of approximately 35 MPH, the transmission shifted abnormally, and the vehicle started vibrating. Additionally, the contact stated that while driving at speeds of 65 MPH and higher, the failure worsened. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 146,000.
The contact owns a 2014 GMC Sierra 1500. The contact stated while driving 50 MPH, the transmission inadvertently shifted to neutral(N) and the vehicle stalled. No warning lights were illuminated. The contact related the failure to NHTSA Campaign Number: 14V374000 (Power Train). The vehicle was not diagnosed nor repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure. The failure mileage was 112,000.
The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving downhill, the vehicle failed to accelerate as intended while depressing the accelerator pedal. In addition, the vehicle felt as if it were in neutral. The tachometer gauge revved up independently. No warning lights were illuminated. The contact pulled to the side of the road. The contact opened the front hood and noticed that one of the transmission lines had failed. The vehicle was towed to the residence. The contact replaced the hose and filled up the transmission reservoir. The contact stated that the failure persisted. The vehicle was taken to a specialty transmission place and rebuilt the transmission. The vehicle was repaired. The contact stated that a few months later the failure persisted. The vehicle was towed to the specialty shop, and the transmission was replaced. …
I am experiencing ongoing issues with the 6L80E transmission that have significantly affected the performance and reliability of my vehicle. The transmission shifts harshly between gears, hesitates when accelerating, and occasionally slips before engaging. There is also a noticeable shudder during acceleration and inconsistent shifting, especially at lower speeds. These problems have become more frequent over time and raise concerns about the safety and dependability of the vehicle. The transmission does not operate as expected for normal driving conditions, and the issues negatively impact the overall driving experience. I am requesting a thorough inspection of the transmission, an explanation of the cause of these issues, and an appropriate repair or resolution to restore the vehicle to proper working condition.
At slow speeds, multiple times, I have had the truck completely have an electrical failure and the engine shut off. I have replaced the negative battery cable and ensured all connections are good. This has happened on streets when turning and in parking lots. When this happens all of the screens in the truck flicker and the service stabilitrack light comes on and then everything goes out, to include the engine. Myself, my family, and other drivers have been out at risk when the truck completely shuts off on a street. The dealership has not been able to give me an answer. There are many forums online where the 2014-2018 year models of this and similar GM vehicles have had the same problem. We need a specific fix for this before someone gets seriously injured or killed.
I was driving and was almost home when I heard a pop and started getting jerked back and forth and then just slowed down almost to a complete stop with vehicles approaching quickly almost causing a multiple vehicle pile up I've heard multiple people complain about the particular transmission that is put in these gmc and chevy 1500s and am just confused with all of the problems I see on the internet and hear from peers in person why it has not been recalled yet if need be I will make a survey of gmc and chevy owners to let it be known that the transmissions on these vehicles were poorly built and need to be recalled before anybody has this problem that I had today
Transmission complaints in other Sierra 1500 years
Frequently asked questions
How common are transmission problems on the 2014 GMC Sierra 1500?
NHTSA has 69 complaints about the transmission & drivetrain of the 2014 GMC Sierra 1500, 9% of the model year's 743 complaints. The component named most often is transfer case (4-wheel drive) (1 mentions).
Is there a recall for 2014 GMC Sierra 1500 transmission problems?
No. NHTSA lists no transmission & drivetrain recall for the 2014 GMC Sierra 1500, though it has 9 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2014 GMC Sierra 1500 transmission problems start?
Half of the complaints with a recorded mileage happened before about 70,000 miles, and 20% before 25,000 miles.
Is it dangerous?
Owners linked 3 crashes, 0 fires and 0 injuries to transmission & drivetrain problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.