When to get rid of tow veichle

Man, those problems are SO GM! Stepped motors, actuators, manifold bolts. These are fairly easy repairs that should only happen once in the lifetime of the truck. Definitely not major, except for possibly the transfer case. I'd stick with it for now, but start saving. Often it seems that when it rains it pours, and the repairs come left and right. You might go another year without a repair and save a ton of cash. But if it continues to give you problems then you have some extra cash put aside. You've already lost the biggest percentage of depreciation, and a vehicle is probably the worst investment you can find.