I have never had such a bad experience. I have serviced a Yukon or Suburban like truck for 15 years and the service at this dealership was the absolute worst. In a nutshell, I was told "no" when I asked them to breakdown the $1200 bill for a tune up and battery replacement over the phone. He said I would have to wait until the next day when I picked up the car. When I then told the service department that I would be down by their closing time of 5:30, he responded with "if you're not here at 5:30, I'm gone". I got there at 5:28 and the service department was locked up, no sign of anyone.
There was life in the sales office and they helped me in "allowing" me to pay my outrageous bill for a tune-up and battery replacement, trying in vain to defend their co-worker in the service department.
Unbelievable, in this hard economic time, especially for GM, I was trading in my 2006 Yukon XL Denali in October, they just lost a customer.