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Has anyone had this update performed yet? I was talking to my Service Advisor today about it. He claims that other customers have reported gaining 2-3 mpg after receiving it. I am scared because I think I will loose mpg's. Thanks!

Here some pics of my new leather interior. What do you think? Los

When I barely turn my radio up, my rear door locks are rattling. :mad: Has anyone else experienced this? I will bring it to the dealerships attention next week, when I take it in for service. Thanks!

This is my first post. So please bare with me. :o I have an 07 Yukon XL. When I replaced the factory wheels with my 22's. The system stop working, just like I expected. About a month later, the flat tire light on my dashboard was off and I wasn't receiving the service system message in...