Same here. I have a 2013 with 49K on it and it has been a good vehicle. The Active Fuel Managment (AFM), now called Dynamic Fuel Managment. Is a deal breaker for me on my next vehicle as well.
Anytime you introduce a complex system into a vehicle you create more failure points and decrease reliability.
Many of the GM vehicles mentioned in this thread do not have the AFM system so keep that in mind.