My mom used to have a '10 Traverse. Worst GM vehicle my all-GM family has ever owned.
The engine locked up at around 60,000 miles. The dealer crated up the engine and sent it to GM "for analysis" but they never did say what truthfully went wrong.
Shortly after, the front-end developed a violent vibration. The dealer found the right front tire was almost completely worn to the bands on the inside (after just being in the shop at 60k mi.). They price-matched Costco for 4 new tires and paid for an alignment.
By 20,000 miles on the brand-new engine, the power steering pump died (was not recalled at the time, but was a common problem with the platform).
The dealer quoted $1,200 for a new rack & pinion and power steering pump.
She got the work done at a trusted independent shop for $900.
GM later issued a recall for the steering issues, so GM paid for that too.
All of our (running) GM vehicles in the family are an average of 21 years old.
If you're a buy-and-hold owner, you probably do your own maintenance, so I can tell you from experience, a midget in China would have a hard time working under the hood (unless something has changed since 2010).
IIRC, the headlight bulbs were an SOB to replace. I've seen videos where they take off the front tires to change a bulb.
Just from doing preventative research back then, I have heard "spun rod bearing" mentioned more than once in regard to the 3.6L.
I heard "oil related" thrown around a lot too, even in our case.
Call it an inept dealer, or a lemon, but that was my experience with the Lambda platform and the 3.6L
I constantly harassed my mother about being able to get four GMT360/370s for the same price as the Traverse. (That would have been what I did).
I would stay away from any 3.6's from around 2010.
http://www.gminsidenews.com/forums/f53/acadia-3-6l-chain-stretch-98372/index2.html
http://www.gminsidenews.com/forums/f53/acadia-3-6l-chain-stretch-98372/index2.html#post2423038