One problem related to tire bubble has been reported for the 2013 GMC Terrain. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 GMC Terrain based on all problems reported for the 2013 Terrain.
A second michelin latitude tour tire on 2013 GMC Terrain (purchased new in may 2013) had repetitive low tire pressure showing on the tpms. After 1 week of inflating to spec pressure and only have it happen again, removed the wheel and tire to inspect for an embedded object (e. G. Nail) in the entire tread area and sidewall. Nothing visible. Replaced and inflated to spec again. 2 days later low pressure again. Removed the wheel/tire from the vehicle again and mixed a soap solution to inspect the tread area for a leak. After thoroughly inspecting the entire tread area twice, noticed a slow leak bubbling on the sidewall at the tread-sidewall interface (tire mold seam?). Probed the leak site for embedded glass or object and found nothing representative of a road hazard event except the air leak in the sidewall. Plugged the leak with a tire plug to show location and took it to the dealer. A tire with leak in the sidewall even plugged is too dangerous to drive on. I am waiting for a new tire.