Today on this 2002 GMC Envoy, we're going to be test fitting the Thule Vertex 4 Bike Rack, part number TH9029XT. We have a bike already on our rack, let's go ahead and take a closer look and show you how it's attached. This has 3 points of contact on the bike's frame: you have the 2 straps on top here, plus this strap here on the side which is anti-sway strap which keeps it from going side to… see more >