The service I received on the Buick side was wonderful. However, several weeks prior I had gone to the Quick Lube on the Chevy side. I had received a coupon in the mail that said I had 4 free oil changes. I presented it to the individual at the Quick Lube who very nastly proceeded to fight with me that this coupon didn't exist, and according to his computer, I didn't have anything. He refused to look at it, ask someone else, just pretty much told me I was lying. When I asked him how long it would be until they could take me in for the oil change, (There was no one being serviced)and he told me it would be 1 1/2 hours or so, because everyone was too busy.
I called the Buick side at a later date, talked to the service manager there, scheduled my appointment, took my car in to them, and low and behold, my coupon was
Thanks for listening. I am rating my service answers on how I was treated on the Buick side.