Drive shaft is out of balance causing it to shimmy on the highway, called GM several time no response to problem tokk back to kupper Chevy in mandan nd they won't fix needs new drive shaft been complaining since 5000 mile now has 54000 and still will not fix

- Braddock, ND, USA

Transmission shifting rough, sometimes when shifting into reverse it bangs loud, thinking the drive shaft is going to fall out, when driving the shifting of the transmission jerks nothing smooth about it shifting

- Columbia Station, OH, USA

Under acceleration and cruising highway speeds the vehicle vibrates and shakes. It is felt in the floorboards, seats, pedals, steering wheel and in the bed of the truck. Vehicle has been into the dealership numerous times getting alignments, wheel balances, and pico scope tests. Under my own investigation I found the factory driveshaft was not straight, out of round and out of balance so I had a professional driveline shop build me a new one. Also under my own investigation I found the rear axel hub flanges were out of round as well and the local dealership had replaced them. Vibration still exists and there seems to be no answers coming from GM.

- Moorpark, CA, USA

This truck has the 6.2 and 8 spd trans. I start it up in the garage and let it idle down, back out of the garage into the street, put the car in drive and feel it engage, push on the gas and it doesn't move for a few seconds or now it will move but then when it tries to do the 1-2 shift it won't shift and the truck stops moving forward for a few seconds until it finally does shift. I had it in to the dealer at 13K miles and they determined there was a problem with the stator support in the trans allowing the converter to drain so they did a partial trans rebuild and updated the parts. The original problem is showing up again along with the 1-2 shift problem. I took it in again at about 18K miles and the dealer said that they could reproduce it and the issues is caused by the "clutch" not being filled with fluid at the time the shift is trying to happen. Once the clutch is full...it shifts. I was also told by the dealer that this is a documented issue with GM and there is a bulletin out on it telling dealers this is normal and to not do any repairs trying to fix so they did a software update and put the trans back into learn mode said they were sorry and gave it back to me. This condition is an accident waiting to happen when you expect the vehicle to move and it does not. This transmission is installed in Chevy, GMC, and Cadillac trucks and SUVS and there many complaints on all of the popular message boards online about this exact same issue. Some people have complained about almost being hit in the rear because there vehicle won't move. There are many other documented issues with the 8 spd trans GM has been using in their trucks as well and GM will not address any of them saying that they are all normal. I have talked to plenty of other people personally that are experiencing the same issues as well and not getting anywhere.

- St Francis, MN, USA

When shifting into gear transmission makes load noise.

- Staten Island, NY, USA

Truck shakes at speeds at 55 to 65 miles per hour.

- Forestdale, MA, USA

So due to known issues with the yolk on the differential, the lag in the transmission shift and engine communication leads to extreme vibration at highway speeds and clunking and jerking while driving around town. So when the transmission shifts there is a delay in the motor recognizing it so it revs up some so when the transmission finally finds the gear it causes it to kick. And since the yolk has play in it, it causes the differential to clunk as the rotation of the driveshaft catches up at a quicker rate. Which leads to more looseness in the yoke and creates a wobble in the driveshaft. And an unsettling sound while driving around.

- Kaiserslautern, AE, USA

At highway speeds between 58 and 74 mph, there is a vibration that shakes the truck. My first trip to the dealership, they said 3 of the 4 tires needed to be replace, which was covered under warranty. The truck had approximately 3500 miles, when I took it the first time. The problem was stable for a few thousand miles, and then started to get bad, I called and scheduled an appointment, and the truck has been at the dealership for over a week now, and they have replace the one tire that wasn't orginally replaced. They also said they are looking at the exhaust system.

- Round Rock, TX, USA

While driving on the expressway, the drive shaft broke off. This caused the vehicle to lose control. Luckily, the vehicle was able to make it to the side shoulder without causing an accident. The dealership replaced the drive shaft and rear differential, but no one (even when I contacted GM priority care) could inform me why this happened. With me having two small kids, I am still concerned that this could happen again.

- Richton Park, IL, USA

The contact owns a 2015 Chevrolet Silverado 1500. The contact stated that while driving at various speeds, there was a loud clunking noise coming from the rear of the vehicle. The contact stated that the failure occurred after shifting gears. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 17,000.

- Bath, NY, USA

My truck had approximately 10 miles when I purchased it in Dec 2014 and has been in the shop pretty much ever since. Immediately after purchasing the vehicle, I felt a very substantial vibration around 76+ mph. Initially, 2 tires were replaced and balanced; that did not correct the problem. Then the dealership indicated that GM said I have to put 500lbs in the back of the truck and the vibration will stop; this is not even remotely practical. Subsequently, the tires have been rotated and force balanced several times throughout the past 2 yrs. In June 2016, the dealership stated the problem was that the tires were mounted on the rims incorrectly and replaced all four tires and balanced them; the vibration continued. After trying to schedule another appointment with the dealership over the same issue, they will no longer call me back. I have attempted to schedule an appointment at least 8 times within the past month to no avail. Several people have indicated the problem is quite possibly the drive shaft B/C the entire truck vibrates while driving down the road. Therefore, I took my vehicle to another dealership where they told me I need to rotate and balance the tires. After discussing the history of the truck with them and requested the service dept. Check the drive shaft, they stated the service manager said it is not the drive shaft (which was not inspected to my knowledge) and told me the tires need to be forced balanced and they could not help me. This dealership referred me to another dealership for assistance. I have been fighting this issue for almost 2 years now and cannot get help. Further, neither of the dealerships have made me aware of the bulletin and have not tried anything past the replacing & balancing the tires. The vibration is so bad other things in my truck are starting to come loose and vibrate.

- Tickfaw, LA, USA

Transmission is lurching if driving 50 mph then slow down to 35 mph when you go to speed back up it lurches. Complained to Chevrolet several times they say cannot find anything wrong.

- Fort Walton Beach, FL, USA

Purchased new 2015 Chevrolet Silverado 1500 in January of 2016. Experienced a vibration at all speeds from the very beginning of purchase. Vibration gets worse at higher speeds. Vehicle came with steel wheels from the factory. Vibration can be felt in the seat and seen in the center console. Vibration is coming from rear of vehicle. Replaced wheels and tires with aftermarkets. The aftermarkets were bigger and heavier and made vibration extremely worse. After assuring that I wasn't dealing with a problem with the new wheels and tires, I put the factories back on and took the vehicle to dealership and reported the problem. The vehicle was in the shop for 3 1/2 months. The vehicle failed pico scope tests. They put several new tires on the vehicle, changed both rear axles, and changed ring and pinion in rear end. These steps helped reduce the vibration, but did not totally resolve the issue. They then decided to put aluminum wheels on the truck, which helped reduce the vibration down to barely noticeable. My concern is by putting the lighter wheel on the vehicle to reduce the vibration, they are only masking the problem, since the heavier the wheel/tire assembly, the worse the vibration. They are telling me they do not have to do anything else to the vehicle. General Motors has told me they are not going to pursue the issue any further. They tell me they know there is an issue but not sure what it is and since it is not a safety issue they have honored the warranty. How do they know that it's not a safety issue if they don't know what the problem is. I believe they know exactly what the problem is and they are passing it on to the consumer. There was no disclosure of the issues with these trucks upon purchase. I do not feel safe in this truck and fear future problems with the issue. Also, the truck on several occasions has down shifted abnormally causing rpms to rise.

- Lumberton, TX, USA

On Sept 21 2016 I arrived at my home. I drove up my gravel driveway in D(drive) and slowed to a stop and my truck began to roll backward under my control. I was checking on the ground for lawn damage. The truck shuttered twice, shut off and started to roll backward toward a tree. I quickly regained control with a panic stop. I was able to place the truck in park and restart the truck. I had lost control of the truck.

- Kittery, ME, USA

I park in a 5 level parking garage. Several months ago, I was leaving when I came up to the ramp to the next lower level. I let off on the accelerator before I went from flat to lowering ramp. The truck shifted up to second gear, accelerated and through me toward the vehicle in front. The truck went out of my control. If I were not a safe driver I would have struck the vehicle. This issue has occurred another time as well. There have been other problems which are numerous. I will address them individual in further complaints.

- Kittery, ME, USA

The contact owns a 2015 Chevrolet Silverado 1500. While driving 10 mph, the accelerator pedal was depressed and the vehicle accelerated in excess. The vehicle was taken to a dealer where it was diagnosed that the wiring harness, part of the transmission, and multiple other parts needed to be replaced. The vehicle was repaired; however, the failure recurred. In addition, while driving at a very low speed, "haul gears" displayed on the message board as the vehicle switched into a low gear independently. The manufacturer was notified of the failures. The failure mileage was 3,000. The VIN was unavailable.

- Cyprus, TX, USA

The contact owns a 2015 Chevrolet Silverado 1500. Upon depressing the accelerator pedal, the vehicle was extremely slow to accelerate with a drastic reduction in speed without warning. The vehicle was taken to two dealers who were unable to replicate and diagnose the failure. The manufacturer was notified of the failure and provided no recommendation or repair solution. The failure mileage was not available.

- Lancaster, NY, USA

Service# pip4112Q 2015 Chevrolet Silverado. 10,000 miles. During acceleration at low speeds while turning or changing lanes vehicle hesitates and sag. Result of torque management. Safety concern with turning into traffic. Manufacturer states working as designed and failing to respond with repair/recall.

- Sugar Hill, GA, USA

Please see attached documents pertaining to vibration issues, emergency brake cable being cut and U-joints oozing grease. Also have numerous videos on the vibration issues like many others.

- East Stroudsburg, PA, USA

The contact owns a 2015 Chevrolet Silverado 1500. While driving 30 mph, the vehicle downshifted uncontrollably without warning. Also, while in the park position, the vehicle suddenly lunged forward and had to be restarted. The contact stated that the transmission independently engaged into first gear without warning and caused the vehicle to shift forward on more than one occasion. The vehicle received an unknown repair, but the failure recurred. The manufacturer was made aware of the failure. The failure mileage was 14,000.....updated 0711/16

- Cheyenne, WY, USA