Today on our 2012 GMC Sierra, we'll be test fitting the Thule Apex Swing 4 Bike Carrier, part number TH9027. To begin our test fit, we'll slide the shank of the carrier into the opening of the hitch, inserting the black knob located at the base of the carrier to engage the anti-rattle device. Now, let's go over some clearance measurements to see how the bike carrier and this vehicle fit… see more >