Yes, the McKinney dealership provided me with a loaner while mine the work is being done, and today marks one week since I dropped off my truck.
I am not very happy driving around a no-frills loaner truck for a week, and while I understand that replacing a transmission is not a trivial task, it seems stupid to me that I had to leave it with them when the replacement transmission wasn't even supposed to arrive until last night. I haven't even made my first payment on the truck, for crying out loud, and it's already spent a week in the shop.
I think the McKinney dealership does have a few good people working there, but I'm not thrilled with the experience, which I attribute to faulty leadership. I think I will probably start using a different GMC dealership for service, even though it'll mean a longer drive for me. I don't want to go into too much details of my experience in this thread, but I did have some complaints that were essentially ignored by the dealership.
Have you heard anything good or bad about Ewing GMC in Plano? They look like they might be worth checking out for routine maintenance and recall type stuff.