This truck was purchased at 8 pm on 9/22/2014. When driving on 9/25/2014, the truck vibrated as though I was driving over rumble strips at approximately 40 mph, 55-75 mph. In hi-2 mode in drive, the transmission did not shift smoothly, shifting with a mild clunk at lower gears. We called the dealership and described the issues to a service person and made an appointment to bring the truck in for service on 9/29/2014. The dealer stated that the problems were probably due to alignment issues. On 9/28/2014, I drove the truck and experienced the same shifting and vibration issues. I pulled off the freeway near my destination and stopped at a light. When I attempted to accelerate from the stop, the truck would not move and "revved". it had switched into neutral without any input from me. The transmission shift lever still indicated that I was in drive mode. I drifted into the intersection, unable to get the truck to move. I was able to shift into park, then neutral, and then drive. The truck began to drive and then I felt a strong "thunk" that felt as though I had been rear-ended by a car going at least 25 mph. The truck then drove normally for approximately 150 feet. I had to stop at the light on the other side of the underpass and the same thing happened again, leaving me drifting into an intersection. I was again able to get the truck going after a minute or so, with the same strong "thunk". I called onstar to have the truck towed to the dealership because it is unsafe to drive. On the four other days that we have owned this truck, it was driven only a few miles each day, at low speeds. I am extremely concerned. The truck is unsafe to drive and has less than 300 miles on it. Additionally, some of the issues I have experienced are similar to those addressed by a recall, but this truck's VIN is not listed in the recall.

- Reseda, CA, USA

Since I purchased this vehicle is has had a vibration from 5-20, 40-50, and 68-78. It has been in the service department 4 times for this problem alone with no resolution. General Motors understands their is an issue with this model truck but does not have a solution. The vibration is felt in the seat, the gas pedal, the steering wheel and the rest of the truck. Tires were indexed, rotated, and balanced, along with the drive line specifications inspected and were found within normal limits even thought vibration persists. Other issues I have had were the exhaust squeaking noises when transferring from V8/V4 mode, in which the entire exhaust system was replaced, water leaking from the sunroof and windshield, frame coating peeling off causing the frame to rust, the seat frame shifting, moving and clicking when turning the vehicle, hd radio loses signal intermittently, radio and HVAC knobs were not lit, headlights were misaligned from the factory, and 4 other recalls such as, overheated exhaust components, unwanted transfer case shift to neutral, peek in odometer display incorrect, and transmission oil cooler connections possibly being bad. This vehicle currently has 6500 miles and has been in the service department a total of 30 days so far.

- Loxahatchee, FL, USA

When the truck reaches a speed over 35 mph the steering wheel, the seat, and the entire truck has a vibration. I live in East Tennessee. I purchased the truck in Georgia. It is about a three hour drive from where I purchased the truck to my home. On the drive home I noticed the vibration right away. I thought it may be a tire balance issue so I continued the trip home. The next day I talked with the local dealer and was informed I need 500 miles on the truck before they will work a vibration issue. When I took the truck for service a few days later I was informed that several trucks have this same issue and GM does not know what to do about the issue. The dealer balanced the tires and told me that is all they can do about the vibration. Through searching the internet and talking with other dealers I have found that may parts have been replaced with no help. Drive shafts, axle shafts, wheels and tires have been replaced and rear ends have been rebuilt. Nothing seems to help. Most dealers have worked this issue on several trucks. If this vibration is coming from any part of the drive train or suspension and the part has a catastrophic failure it can cause serious injury or possibly death.

- Seymour, TN, USA

The contact owns a 2014 Chevrolet Silverado 1500. The contact stated that when the steering wheel was adjusted to the upper most position, the power steering seized. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 200.

- Mesa, AZ, USA

The contact owns a 2014 Chevrolet Silverado 1500. While driving 3 mph, the vehicle independently shifted into neutral and the brakes and power steering failed. As a result, the contact crashed the vehicle into a light pole. The air bags failed to deploy. There were no injuries. The contact received a recall notice for NHTSA campaign number: 14V374000 (power train) after the crash. The vehicle was not repaired. The failure mileage was 7,000.

- Kingman, AZ, USA

Bad shake at highway speeds, balancing tires didn't help, faulty steering components could be a safety issue.

- Muskegon, MI, USA

When driving at highway speeds on winding roads, the steering does not return to center when the turn is finished. The steering "sticks" and the wheel needs to be pushed back to center. The steering sticks hard and it takes considerable force to return the wheel to center, sometimes resulting in an overcorrection, and loss of lane position. The truck is difficult to control and impossible to keep centered in the lane when having this problem. The problem consistently happens at highway speed, and on winding roads. Gentle curves do not produce the problem, but the winding interstate highways of Kentucky, Virginia, West Virginia, and North Carolina do. The truck now has 7000 miles on it, and the problem appears to be getting worse.

- Royal Oak, MI, USA