I own a beautiful 2015 escalade, I love the car. However, I have major defects. 5 months after purchase check engine light was going on. after 9 days in the service department they had to put in a new fuel injector. 3 months later, I had a vibrating/humming noise on the driver side as I accelerated. In April the had to rebuild/replace the front differential. the noise is back again and I will be taking my brand new car in for servicing again. Has anyone had these issues?