I live in Grand Rapids and take this train often. They use the SC44 but no longer use the viewliner coaches as those have been replaced by the Amtrak Midwest Venture coaches. The trains often have one SC44 engine and 3-4 passenger cars plus a dining car. During the busy holiday seasons the trains can consist of 4-5 passenger cars and a dining car.

It is, currently they use Genesis on one end and engineless version of F40 as a cab car

Isn't this literally a Midwest version of the Surfliner XD