Today on our 2012 GMC Terrain, we'll be test fitting the Yakima RailGrab Roof Rack System using part numbers Y00408 and Y00138. With our roof rack system already pre-assembled according to the instructions, we're ready to go ahead and fit it to the vehicle. We'll start by putting the front crossbar on the factor rated side rails. We can then make sure that the crossbar is even with the vehicle and then tighten down the silver Allen bolt with the included Allen wrench. Now that our silver Allen bolts are tight, our crossbar is locked into place, and with the towers directly over the side rails, we'll simply tighten down the black Allen bolt to secure it to the vehicle. With our front crossbar secured to the vehicle, we'll now move on to the rear crossbar.
Now, Yakima states that the maximum crossbar spread with this system is 33 inches. We're going to go ahead and set ours to 24. To do this, we'll measure from the center of the front crossbar to the center of the rear crossbar on both sides which not only will give us our 24-inch crossbar spread, but we'll also make sure that the rear crossbar is parallel with the front crossbar for ease of loading our accessories. After finding the correct location for our rear crossbar and making sure that the crossbar is even with the vehicle, we'll go ahead and tighten down the silver Allen bolts to secure the bar to the towers. And after securing the load bar to the towers, we can go ahead and tighten down the black Allen bolt to secure the tower to the side rail.
And now that our rear crossbar is secured, our roof rack system is fitted to the vehicle and we're ready to load our accessories. And that completes our test fit of the Yakima RailGrab Roof Rack System, part numbers Y00408 and Y00138, on our 2012 GMC Terrain.