I changed the plugs on my 2016 yesterday. It wasn't too terribly bad but bank 2 was certainly fun. Service manual said to drain coolant and remove the surge tank. I almost thought that was going to happen but turns out, you can get the first two out without doing that. I didn't even loosen it or move any hoses. Your hand will pay the price,however. It took a minute to figure out how to get those boots off. Thank the good Lord for the internet. The original ACDelco plugs looked pretty good. Replaced with the NGK.
