What years cadillac engines will fit in my 2012 cts 3.6l rwd to swap engines

Hello, the best answer is that it's always best to consult with a used parts / salvage yard consultant who has a good sense of application proper cross reference for the components they sell. From the brief parts look up I did, the 2012 CTS 3.6L engine is unique to that year, with 2011 and 2013 having different part numbers. I'm not certain what the change would be, but it appears all 3 years are different.

I have a 2012cts couple rwd. I needed a engine. Found one . called an asked the man told me the engine im buying (2013 3.6) is a plug an play engine an WILL hook up to my 12 shouldn't be a problem. My mechanic looked in a mech book an it will fit an hook up. Haven't received the engine yet should be here within a week.if I can remember I willet everyone know