I've had movement in my drivers seat since the day I've owner the truck. GMC put in a shim kit to address the problem but it's still acting up. They refuse to replace or repair any further. Also my transmission has a horrible shifting problem. When it's cold out or after the first time shifting into gear after sitting a long time, the truck lags to shift into gear then all of a sudden lunges forward or backwards depending on which gear I'm in. I've almost ran through my garage door and side fence and had to slam on the brakes. GMC has looked into the issues but won't resolve them. The last 'repair' made was to change out the transmission fluid. That had helped with the hard shifting while driving but the truck still lunges forward or backwards and lags shifting into gear. I've had to learn to deal with it but anyone else who would drive my truck could seriously hurt themselves or someone else

- Bourbonnais, IL, USA

Driving on the highway brakes locked up break pedal super hard to press

- Gilroy, CA, USA

When driving and the truck shifts gear in 30mph it starts to vibrate or jerk and the RPM just bounces up and down same thing happens in 40 mph and 50 mph as well I have taken it to the dealer ship in fall of 2019 and all they did was a trans fluid flush. And worked fine for a bit now the truck started to do the same thin in the begining of July 2020 and took it again to the dealer and they wanted to do the same thing they did in 2019 do the trans fluid flush. Not this time my extended warranty was not covering it because the said it was a maintenance which is not correct because GM know it was an issue and I had already done the fluch back in 2019 and the dealer didnt want to cover it ethier I would have to pay almost 500 to get it done. I dont know hat else to

- Mission, TX, USA

Problems with transmission jerking, hard shifting, jumping, only have 60,000 miles on it. Took it back to dealer 3 times and they told me each time it was normal. Told them I have been driving 40 years and that was not normal. They never done anything. Now I am having more problems with it, getting worse. Now I find out there is a lot of people with same problems. GMC knows something is wrong and should take care of it.

- Scottsboro, AL, USA

The contact owns a 2016 GMC Sierra 1500. The contact stated that while driving about 70 mph, the vehicle shuddered without warning. The vehicle was taken to the penske Buick, GMC of South bay located at 18600 hawthorne blvd, torrance, ca 90504, (310) 853-5860, where the vehicle was diagnosed and technician changed the transmission fluid however, the failure recurred. The vehicle was not repaired. The manufacturer was notified of the failure and the contact was referred back to the dealer. The approximate failure mileage was 47,000. The VIN was invalid.

- Hawthorne, CA, USA

Sometimes at certain RPM when the truck shifts it shift really hard jerking the whole truck

- Ozone Park, NY, USA

8 speed transmission shudder and jerk. Have taken it to the dealership several times regarding this issue, nothing has completely fix the issue.

- Houston, TX, USA

Transmission has failed from 4th gear up (3) times within 91,000 miles. When going at speeds more than 50 miles an hour, the transmission will break and lose forward motion causing a safety issue with oncoming traffic. The transmission was "rebuilt" at lafontaine GMC of highland, mi (2) times and they are telling me they are going to "rebuild" it a 3rd time. Just wanted to note safety issue so when this happens in the future I will have a legal avenue.

- New Hudson, MI, USA

The contact owns a 2016 GMC Sierra 1500. While driving various speeds, the vehicle slammed and jerked into gear. When the brake pedal was depressed, there was a shutter and vibration detected in the transmission. The vehicle was taken to mac haik Chrysler Dodge Jeep Ram (12111 katy fwy, houston, tx 77079, (713) 538-2700) where it was diagnosed that the transmission fluid needed to be replaced. The vehicle was repaired, but the failure recurred. The vehicle was taken to monument Chevrolet (3940 pasadena fwy, pasadena, tx 77503, (713) 473-7601), but was not diagnosed or repaired. There were no warning indicators illuminated. The manufacturer was contacted and provided case number: 9-5585814814, but no further assistance was provided. The failure mileage was 50,000.

- Crosby, TX, USA

The contact owns a 2016 GMC Sierra 1500. While driving low speeds, the vehicle shifted up and down very abruptly and shuddered uncontrollably. The failure occurred when accelerating or decelerating without warning. The vehicle was serviced three times at cavender Buick GMC North (17811 san pedro ave, san antonio, tx 78232, 210-807-6392) where the transmission software was re-coded and a special transmission fluid was applied to the vehicle. The failure persisted each time after it was serviced by the dealer. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was approximately 1,000.

- San Antonio, TX, USA

The contact owns a 2016 a GMC Sierra 1500. While driving 65 mph, the vehicle started wobbling. The vehicle was taken to wallingford Buick GMC (1122 old North colony rd, wallingford, ct 06492, (203) 269-8741) where the brake pads on the front driver's side wheel were replaced; however, the failure recurred. The vehicle was taken back to the dealer and test driven. The technician diagnosed that the rotors needed to be resurfaced, the front brake pads needed to be changed, the transmission fluid needed to be drained, and the computer needed to be reset. The contact retrieved the vehicle and the failures recurred the following day. The dealer advised the contact to give the vehicle a few thousand miles to work out the failures and stated that the transmission was adjusting to the contact's driving habits. The vehicle was not repaired again and the failures were still present. The failure mileage and VIN were unknown.

- Anisona, CT, USA

Truck lurches forward unexpectedly during slow stops such as when approaching a barrier to park, a gate, or pedestrian crossing. As the transmission downshifts, the torque increase causes the brake pressure being applied to become insufficient to stop the vehicle causing it to lurch forward up to six feet. During accelleration while highway driving the transmission may unexpectedly downshift to an inappropriate gear causing the engine rev limiter to engage and reducing power unexpectedly when it should be increasing.

- Oklahoma City, OK, USA

When traveling low speeds like in a parking lot first gear jerks so bad it feels like someone rear ended you. Going highway speeds between 45 to 75 you feel vibrations coming from the transmission it feels like you're going over rumble strips. I had my transmission flushed and changed it fix the vibrations but 3000 miles later the vibrations started again.

- Cameron, TX, USA

I have had issues with my GMC Sierra since it was new. It has jerked and clunked when I start to go and then left off the gas. There has also been a hesitation when stepping on the guess. I have taken it to the dealer several times and was told things such as: "I just needed to get use to the 8 speed transmission"," the hesitation is when the truck switches from V4 to V8". and "there is nothing wrong". now the warranty has expired and it is getting worse. It now feels like "running over a rumble strip" or like it is "missing" and "hesitating". all of these things occur when the vehicle is in motion.

- Eden, NC, USA

My 8 speed transmission seem to wait too long to up shift. Will down shift at odd times. When is stop and go traffic around 5-15 mph the truck will lurch forward when coasting or coming to a stop. When truing on the truck and going from park to reverse there will be a loud "clunk" that can also be felt causing the truck to rock.

- Bakersfield, CA, USA

2016 GM Sierra - 85,000 miles never had many issues with jerking/jumping/braking as many have described. Went to accelerate from a stop light and the truck would not shift out of second gear. Could not get truck to shift and would then shift hard upon deceleration. Took to the dealer service department. They said the torque converter is shot and 4th, 5th and 6th gear is trashed. I only have 85,000 miles on the truck, mostly highway miles and very limited towing on the truck. GM changed their warranty from 100,000 miles to 60,000 miles. I had an extended warranty up to 75,000 miles. Now they won't help with any of the cost. Would hope they might stand by their equipment a little more than that. Especially since they are having some major issues with their transmissions as shown in all the complaints.

- Paradise, TX, USA

Truck hesitates, jumps, and bumps when applying brakes. When stepping on brakes to stop, it bumps and jumps before it actually comes to a full stop. It seems you really have to step on the brake hard to make it come to a full stop. This is worse on low speed, below 30 mph, stop and go traffic. There were a number of instances I almost rear ended vehicles in front of me due to this problem. The truck also bumps and jumps when taking off. I think this started a few months after I got the truck brand new. It is getting progressively worse. I took it a number of times to GM service center; they did a transmission relearn, software updates, and transmission flush--truck got better for only a few hundred miles, then same problems recurred. The latest couple of times I went back to GM service, they told me nothing is wrong with my truck. It has been very frustrating dealing with this problem and GM service for the past 3 years.

- Jacksonville, FL, USA

When driving in slow moving traffic trans mission feels very jerky and shifts hard. Also when going from park to reverse transmission will clunk very hard causing the truck to move. Truck also seems to hesitate when trying to shift in lower gears while accelerating. This has been an ongoing issue since purchasing the truck brand new from the dealership. Prior attempts for service have been explained by their technicians as being an adaptive transmission needing to learn

- Bakersfield, CA, USA

Transmission shifts hard going from 1st to 2nd gear with no fix from GM. Complained to dealer they said it's normal and there's no fix for the issue. Issue also persist when going from drive to reverse, a hard shift that I've never experienced before in several previous GM products I owned or currently own. Happens every time I drive the vehicle

- Arnold, MO, USA

2016 GMC Sierra- bought used hard shifting noted immediately and shuttering on inclines, took to dealership had part replaced- fixed shuttering but not hard shifts- now it not only shifts hard but while I was trying to stop at a drive through the brakes failed- lunges forward almost hitting the car in front of us- next day I pulled into a parking spot same thing happened- brakes would not compress- stood on the brake before it finally stopped- backed up a bit to straighten up and the [xxx] thing did it again in reverse. I'm traveling back home to Arkansas from Florida in a few days with my children and I'm scared to death to drive this thing. I can't get it looked at before we leave because of the weekend/ christmas break.seriously unsafe vehicle! there should be recalls on these vehicles! I've read so many similar stories, why has this not been addressed yet? GMC should be ashamed. Parts of this document have been redacted to protect personally identifiable information pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Hot Springs, AR, USA