Was told by dealer that the timing chain was just replaced, no other history available.
No other history they want to tell you about.
what should I be concerned about?
That you are looking at buying a 2012, 4cyl, FWD, Equinox LT with 116000 miles.
what should I expect in the near future?
In the near future you should expect constant trips to the dealer. After that, once any warranty coverage expires, you should expect large repair bills from the dealer.
Was 2012 a good year for Equinox?
It was good for the dealerships.
But seriously - I drive up and down the East Coast a few times every year. I see tons of early-model 4-cylinder Equinoxes on the road. In fact, 99% of them are 4-cylinder models. Rarely, if ever, see a V6 like I own. So they’re out there - running. And every time I catch someone in a parking lot with a 4-cylinder model, I ask them if they’ve had any problems - and every time they say, “NO! It’s a great car! We LOVE IT!”
But I still wouldn’t buy one -used-, with an unknown repair history - and certainly not a 2010-2013 model. No way. Find a V6 model or buy something else.