FLGMC

I took my truck back to the dealer last week. No work was performed on my new truck. They informed me "this is the way they drive/ride. I asked how to get out of this truck, they offered a small trade in value, as a used truck, less than two months old and less the 1800 miles. (they don't seem to want it back?). I am experiencing a high frequency vibration in the floor of the truck and in the gas pedal and break pedal. I test drove two other new trucks in an effort by the salesman to explain "this is the way they drive/ride" they had issues as well. Seems to be a bigger issue for GM than just my new Truck. I am asking for someone from GM to PLEASE contact me. If anyone has contact information, please share. The dealership asked that I drive the truck a while to get used to the ride/drive. THE VIBRATIONS.

The Shop Forman said they were GM Certified parts? Not sure, looks a little odd?

I purchased a 2016 2500hd GMC 6.0 L gas. i have a vibration issue in the gas pedal, steering wheel. The dealer had the truck for a week. He installed new motor mounts and some type of weights to the exhaust pipe. Has lessened to problem for now, I am not sure this has solved the problem. My question is does this occur with the diesel trucks?