Bought used with 42K miles on it, got smart and bought used car warranty. The warranty paid for itself with warranty repair at ~60K miles. Every year the check engine light comes on every spring and stays on till autumn and then extinquishes with the cooler temperatures. Found out it was related to some (again) transmission related problem....still works with light on. Like so many others also had to replace front wheel bearings (sealed, designed for zero maintenance?) and replace the cheap seat reclining mechanism passenger side. Of course the electrical stuff in the drivers door is always a problem, but probably due to mechanical (dirt etc.) I hear the motors.
Except for the transmission failure and possibly impending same failure, have not been shouldered except once when I did not recognize impending battery failure (none since and unexplained?)
This vehicle has been replaced with a newer model. GMC I have found this experience one of my poorest for your vehicles. (5th GM purchased..1st used GM)
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