Update:
This is me, stewing. I got a call from the service manager, who told me that there is apparently "sludge" in the engine. Part of me can understand that its' relatively hard to detect, but part of me is PISSED that I had to wait an extra 3 days after my local Carmax had gotten the car transferred in from TN because they had to replace the rear caps on the luggage rack which were all scratched BEFORE I could even test drive it! A TEENY bit of confused priorities there, in my opinion. I mean, they tout that they perform a 150 bahZyllion point check list before they clear any cars "good enough" to sell for Carmax. I guess "potential for engine seizure" didn't make the cut?
Going on, the Service Manager said, "We don't think this is the right truck for you."

Uh, wait. What? "We have another one, that's a free transfer in, that you can take a look at." Free transfer my arse. I PAID to get this one in, they can sure as heckles pay to replace it. Anyway, the one that he pointed me to was a 2007, V6, with 50K on it, for the EXACT same sticker that was on mine. Uhm, my 2008, V8, with 53K on it. Tell me how THAT works....
So, I get to go to Carmax now, and spend a few hours discussing the concept of "100% Satisfaction Guaranteed" with them, Now that my "2 Car needing family" is apparently One car short of the required number of cars....
I'll let you know what I find out.