The day after we bought our Acadia, I unknowingly drove over a hazard which sliced the sidewall of the left front tire. It lost all air within two minutes and I called Onstar for assistance. The Goodyear Fortera 18" isn't commonly stocked by either my GMC dealer or the local Goodyear dealer. The GMC service department ordered the tire from the Goodyear dealer who ordered the tire, which had to come from Tennessee. The tire arrived here in Upper Michigan last night, after ten days of waiting. In the meanwhile I have driven it on a few short trips to town on the compact spare, which has worked fine, but mostly it's been sitting in our garage. Be sure to note that the vehicle knows when the compact spare is on, and shuts down both the Tire Pressure Monitor System and the All Wheel Drive. I'm probably the first in the country to waste an expensive tire within 24 hours of owning the car/truck! Has anyone tried to purchase and install a full size spare?