They are absolute swindlers. I have had to get Buick's corporate customer service department involved, and the district manager lied about what assistance they had offered me. The service rep I spoke to also lied through his teeth. This is a horrific dealership, and I will never purchase from them again. Contact me and I'll be happy to provide documentation and exactly whom I spoke to and how they ended up overcharging me $12k that they refuse to do anything about. Avoid!!