I've had three of the new body style sierras and I have been happy with all of them. Gmc/ chevy usually run a 20% off sale at least once a year. You are basically negotiating just the trade in at that point. My $0.02 worth.
Imho you got more than you paid for it.
Good luck. All the features on the new cars and trucks are nice until you have electrical problem.
Thanks! Electrical problem is exactly why I'm looking. I think I found what I want. Going to look at it here in a few....