Re: GMC Terrain 2017 SLI
the steam--- is it coming off the radiator/grille area?
If not-- and it is falling on the engine from the top- hood area.
it could be a misaligned seal on the hoot (back by the wipers).
Some years ago, there was a Service bulletin on the Trailblazers- for a seal allowing water to get past- and it was dripping onto the top of the engine- and making its way to one of the coils/spark plugs-- over time- it caused misfires.
2013 Equinox LT1 3.6L V6 FWD - 60,000<br />2010 Traverse LT1 3.6L V6 FWD - 127,000 <br />2003 Trailblazer LS 4.2L I6 RWD- 180,000