2014 GMC Sierra 1500 transmission problems

POWER TRAIN

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.

NHTSA complaint #11757905 — an unverified report by a vehicle owner.

POWER TRAIN

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.

NHTSA complaint #11754615 — an unverified report by a vehicle owner.

POWER TRAIN

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. The contact stated that a few months later, while driving at an undisclosed speed, an abnormal odor was emitting from the front end of the vehicle. The contact was able to pull to a rest area, and when the front hood was open, the contact noticed that one of the transmission lines had a leak and transmission oil was being sprayed all over. The contact was able to replace the transmission hose. The manufacturer was not made aware of the failure. The failure mileage was unknown. 

NHTSA complaint #11736362 — an unverified report by a vehicle owner.

POWER TRAIN

hard shifting transmission and fluid smells burnt, shifts hard in the lower gears and reverse

NHTSA complaint #11691120 — an unverified report by a vehicle owner.

POWER TRAIN

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. The manufacturer was not notified of the failure. The failure mileage was approximately 67,000.

NHTSA complaint #11676145 — an unverified report by a vehicle owner.

POWER TRAIN

Truck completely shuts off at any speed going down the highway. Complete loss of power. Have to coast to side of road and restart vehicle.

NHTSA complaint #11672901 — an unverified report by a vehicle owner.

POWER TRAIN

Truck randomly shuts off and steering wheel locks up going down the road

NHTSA complaint #11672478 — an unverified report by a vehicle owner.

POWER TRAIN

Catastrophic transmission failure. Original transmission failed at 113,00 miles. I replaced it at the dealership with a factory rebuilt transmission and that transmission failed after only 40,000 miles. Now the vehicle is back in the dealership shop and they want me to replace the transmission a third time. This transmission is the 6L80 which is prone to fail, the torque converter fails and the transmission locks up I contacted General Motors and filed a complaint with them and they said they would not take any action or assist me with the repair.

NHTSA complaint #11671482 — an unverified report by a vehicle owner.

POWER TRAIN

Within the first week of buying my 2014 GMC 1500 SIERRA, the transmission fluid was black in griddy. I have had it flushed, then filter changed and new fluid put in within 2 week time frame. A week later had to put a new transmission in it. It barely would drive. So a purchase at 2,999 then to a transmission 4,800 and new control arm with ball joint with new axels. They were busted. Another 2,000. Its sicking. Advice

NHTSA complaint #11669678 — an unverified report by a vehicle owner.

POWER TRAIN

During a turn in the parking lot my vehicle would not allow me to turn something with traction control came up on the screen. The past few days the car got stuck at 0 rpms while driving and did not feel I had adequate power and other times has stalled.

NHTSA complaint #11667320 — an unverified report by a vehicle owner.

POWER TRAIN

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.

NHTSA complaint #11662115 — an unverified report by a vehicle owner.

POWER TRAIN

Transmission shutter, not shifting correctly. Had to replace transmission

NHTSA complaint #11658923 — an unverified report by a vehicle owner.

POWER TRAIN

There is a torque converter recall on the 2014 GMC sierra 1500 however my vehicle was not included in the recall but my transmission / torque converter went out.

NHTSA complaint #11635925 — an unverified report by a vehicle owner.

POWER TRAIN

Failed transmission

NHTSA complaint #11630406 — an unverified report by a vehicle owner.

POWER TRAIN

A loud clunk is heard from the transmission when shifting from one gear to anther after having to reduce acceleration.

NHTSA complaint #11597807 — an unverified report by a vehicle owner.

POWER TRAIN

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.

NHTSA complaint #11556617 — an unverified report by a vehicle owner.

POWER TRAIN

Transmission lost power

NHTSA complaint #11544570 — an unverified report by a vehicle owner.

POWER TRAIN

Transmission problems

NHTSA complaint #11531352 — an unverified report by a vehicle owner.

POWER TRAIN

I am losing engine power. My OBD2 gives me P2138 and P0700 codes. I have changed the accelerator and knock sensors.

NHTSA complaint #11517297 — an unverified report by a vehicle owner.

POWER TRAIN

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.

NHTSA complaint #11512146 — an unverified report by a vehicle owner.

POWER TRAIN

My lifters bent and my valves collapsed. I have had the vehicle repaired twice. No engine light warning. Also in Nov of 2022 oil is leaking into my cylinders. Common problem on several GM forums.

NHTSA complaint #11508466 — an unverified report by a vehicle owner.

POWER TRAIN

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.

NHTSA complaint #11501323 — an unverified report by a vehicle owner.

POWER TRAIN

Going under 15mph, applying the brake causes the pedal to become stiff and lock up and not work. This has caused me to almost hit someone in traffic. I immediately got off the road and got my vehicle to a safe location off the road . Communicating with a dealer today to confirm possible recall issue or potential repairs.

NHTSA complaint #11494516 — an unverified report by a vehicle owner.

POWER TRAIN

My truck goes into “neutral” or doesn’t have power while driving at times and can cause a car crash.

NHTSA complaint #11487126 — an unverified report by a vehicle owner.

POWER TRAIN

My vehicle recently started "shuttering" while driving. Service report says it is a "common GMC issue with the Torque Converter", $3200. They also reported a "substantial leak" in the radiator, and again, says it is a very common fault of GMC Trucks. And another $2700. If these conditions are as common as they indicate, why are there no corrective measures?

NHTSA complaint #11461441 — an unverified report by a vehicle owner.

POWER TRAIN

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

NHTSA complaint #11459043 — an unverified report by a vehicle owner.

POWER TRAIN

transmission shifting rough

NHTSA complaint #11445846 — an unverified report by a vehicle owner.

POWER TRAIN

From time to time the vehicles power system will surge, blink, and generally act up. The priblem is intermittent. The check engine light will come in then go off, the engine has completely cut off several times while driving, the transmission acts up, radio will turn off, 120v outlet will turn off, occasionally the vehicle will fun for 5-15 seconds after being turned off and then sputter off. And 95% of the time the truck is absolutely fine.

NHTSA complaint #11423046 — an unverified report by a vehicle owner.

POWER TRAIN

TL* THE CONTACT OWNS A 2014 GMC SIERRA 1500. THE CONTACT STATED WHILE APPROACHING A STOP SIGN, THE VEHICLE BEGAN TO SHAKE FORCEFULLY. THE CONTACT STATED NO WARNING LIGHT WAS ILLUMINATED. THE VEHICLE WAS TAKEN TO THE LOCAL DEALER LIBERTY BUICK GMC (9028 E INDEPENDENCE BLVD, MATTHEWS, NC 28105, (704) 708-8000) HOWEVER, THE MECHANIC WAS UNABLE TO DUPLICATE THE FAILURE. THE CONTACT STATED HE CONTINUED TO EXPERIENCE THE FAILURE. THE CONTACT ALSO STATED WHILE DRIVING AT LOW SPEEDS, THERE WAS AN ABNORMAL SOUND COMING FROM THE FRONT DRIVER'S SIDE WHEEL AXLE. THE VEHICLE WAS TAKEN BACK TO LIBERTY BUICK GMC WHERE THE MECHANIC WAS UNABLE TO DUPLICATE THE FAILURE. THE VEHICLE WAS THEN TAKEN TO GRIFFIN BUICK GMC (2500 W ROOSEVELT BLVD, MONROE, NC 28110, (704) 289-3135) WHERE IT WAS DIAGNOSED WITH NEEDING THE FRONT DRIVER'S SIDE STRUT TO BE REPLACED. THE VEHICLE WAS TAKEN BACK TO LIBERTY BUICK GMC AND THE REPAIRS COMPLETED. THE CONTACT ALSO STATED WHILE DRIVING AT AN UNDISCLOSED SPEED, HE HEARD AN ABNORMAL SOUND COMING FROM THE VEHICLE. THE CONTACT STATED HE HAD THE TIRES REPLACED AND AN ALIGNMENT PERFORMED BUT CONTINUED TO HEAR THE ABNORMAL SOUND. THE VEHICLE WAS TAKEN BACK TO LIBERTY BUICK GMC AND THE CONTACT WAS INFORMED THAT THE GEARBOX NEEDED TO BE REPLACED. THE VEHICLE HAD NOT BEEN REPAIRED. THE MANUFACTURER HAD BEEN INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 87,000.

NHTSA complaint #11387040 — an unverified report by a vehicle owner.