2014 Sierra. Got her back in December ‘13. So far, from what I remember:
-Pinion Seal Replacement
-Engine Replacement (Threw a rod around 30k)
-Heated Seats Stopped Functioning
-Plastic Panel behind drivers seat fell off
-Passenger side window regulator & assembly failed
-Sunroof wind deflectors tore, sunroof fails to open
-AC Compressor died
-AC Condenser died right after
-Paint is chipping, completely falling off rear passenger side.
-Various recalls (seat belt, airbags, seat movement, steering wheel power loss, etc..)
Got the truck with 7 miles. Has right around 58k. It’s sitting at the dealer now, going on 9 days waiting for the condenser to come in. I love this truck, it’s been through a lot. But it’s been the most problematic ones i’ve ever owned.