My sister owns a 2013 Denali Terrain and her transfer case went out. She had it towed to the local Chev. dealership. That was a BIG mistake but it is what it is. Anyway they told her she needed a new one at a cost of $1,200.00 for the transfer case and an additional $1000,00 for the labor!!! And get this - they told her that they're charging for 6 hrs. labor which means they charge a whopping She'll have $2,200.00 + invested in it when it is done and she has to wait a week or more for the new transfer case to come in! Personally, after looking over all of you here who've had the same problem I think there is a defect in them, but try to convince GM of that?!!!! Also, I don't think my sister's car has 40,000 miles on it yet but she bought it used so I know there isn't a warranty that will cover it. It is a shame so many people have had to endure this problem without compensation from GM when it seems there is definitely a problem with them!??