Tschroll

I have the same vibration issues with my 2015 Sierra starts at 75mph had to dealer three times and going back again they keep balancing the tires and it doesnt fix it. I hope they look into other options. I also have the following other issues with the truck 1. Front dash heater vent plastic is bubbled up and the dealer has replaced three times with the same issue and i was told to wait for six months until the manufacturer has another production run 2. In auto 4wd mode there is a noise sounds like it is a bearing or something, dealer states they cannot hear it 3. USB ports give feedback theough speakers when phones are plugged in dealer dismisses it as a phone cord issue which i have tried three different cords and have the same issue 4. The door actuator went bad the dealer replaced and broke the door panel and replaced the door panel with a new one that looks to be cut they are replacing it again The truck had 5k miles on it....need help please