No heated throttle body on mine, so I'm good there! I'll likely be doing a coolant spill-n-fill this spring, but what's in it looks very clean. It also appears to have a new(er) water pump and belt, plus the Carfax shows it had a coolant service not 5k miles ago. Even better, it was the last year GM used green coolant, so no Dex-Cool issues to worry about.
Engine temps have been rock solid: 207-210 cruising which is perfect for a N*.