I went to Coulter on recommendation from my mechanic around the corner who said it would be faster for me to go to a dealer to get my car fixed and said Coulter were good guys if I couldn't find an actual Pontiac dealer.
I have a 2006 Pontiac Vibe, which is not a Cadillac. Or Oldsmobile. But anyway, I had a problem with my car that (luckily) was still covered by warranty but there are pretty much no Pontiac dealers left since Pontiac is no longer in business.
Coulter couldn't have been nicer to me, they didn't try to get me to buy anything and they offer free coffee, tea and donuts in their lounge area along with other food items for sale at their counter in the lounge. They immediately looked up the warranty and all that jazz and offered to drive me somewhere while I waited for the work to be done. They also looked over my car and checked everything, like fluid levels, tires, brakes and CLEANED MY CAR! And mind you all of this was free as I was getting just a warranty repair done. They also were quick with getting the work done, only a couple of hours which isn't bad at all.
I couldn't recommend Coulter more, next time I need to buy a car I will certainly keep them in mind as well as for any repairs I don't think my around the corner mechanic can't handle.