This was a nice thread to read, seeing people who are actually happy with their trucks.
I've got a 15' with about 90k miles on it. (95% highway)
Leaking oil pan replaced (x2)
Transmission clunks since probably 500miles
engine seized and replace at 65k
front right strut seized, all 3 others leaking/sagging a bit. GM currently trying to rake me for $3800
lane departure sensor failed/ replaced
Heptic feedback motor in seat currently failed, waiting for GM to get part in stock
ball joint in very poor shape (due to strut)
rusting frame.
Screen goes black occasionally
About the only common issue I dont have is the vibrations