Today on our 2012 GMC Sierra, well be test fitting the Thule Apex 4 Bike Carrier, part number TH9025. To begin our test fit well slide the shank of the carrier into the opening of the hitch and turn the black knob located at the base of the carrier to engage our anti-rattle device. Now lets go over some clearance measurements to see how the bike carrier and this vehicle fit together. There are… see more >