If you want to see M-6 in google maps, just go to:

maps.google.com

and enter 49508 in the search field. The view that pops up for me shows a nice map of the area, with M-6 framed nicely along the bottom of the window (it is also known as the "Paul B. Henry Freeway".

Notice how much straighter this road is when you want to get from I-196 to I-96 - the path through Grand Rapids takes you much further north than you need to go. This road is known as the "south beltline" around here...