Today in this 2013 GMC Terrain we're going to be test fitting the Thule Vertex 4 Bike Rack, part number TH9029XT. As you can see we already have a bike on the rack. Let's go ahead and take a closer look and show off some of the features. Now how this bike rack is actually attached to the rack, you're going to have three points of contact with your bike's frame. We're going to have two straps up… see more >