I did swap the GM 60° V6 3400 LNJ for the GM High Value V6 3500 LX9 on my 2005 Equinox. It was a Plug-and-Play swap in my opinion.
This only applies to Equinox 2005-2006 and Torrent 2006. Equinox/Torrent 2007-2009 not compatible, more information down below.
Now, my old LNJ...