We have an issue with an 11 Camaro not communicating with the Fuel Pump Control Module. GR Chevrolet loans us their Lead Tech to help us trouble shoot odd ball issues. Brian is here now.
We send them warranty work. We send them cars that have gone off course ;-), we help them out with modified vehicles that show up at their shop. In short, we have a fantastic relationship with them. We had the same relationship with Witt Buick back in Michigan.
Long story short, all GM dealers are not the same. Some are pure platinum.