I bought the 2019 Midnight Edition Z71 brand new. After 15k miles, I started having a very bad vibration in rear. Dealer said tires needed a balance, this didn't fix problem. They tried a force balance rotation, this didn't fix the problem either
Dealer said I had 2 defective tires, and that I would have to replace 2 bad tires. This fixed the vibration problem. Five months later, the vibration is back. Has anyone experienced this type of issue? Any ideas what is causing this?