All of the expensive stuff is covered by the 100 000 km (160 k diesel) powertrain.
6.2 gas is generally bullet proof. I fix the odd transfer case - either the synchro assy wears or the overrunning clutch grenades. Otherwise the most common complaint is lack of auto locking 4x4 hubs, which usually is pinned back to ripped off vacuum lines and the consequent degradation of hub seals, check valves and control solenoid. The 6.7 is the same thing except the powertrain components are covered up to 160 000. And if you have an oil burner then I'm sure you've done the SCR heater by now.
Everything that I've mentioned is all covered past 60 000 km. The small stuff that can come up is otherwise dealt with on a case by case basis and doesn't really warrant the label of 'pattern replacement'.
2003 GMC Sierra 3500 -- dually, 4x4, hasn't blown up yet and that's what i look for in a truck
Ford Doctor -- They come in broken and leave fixed. Ford of Canada Master Tech