Tl* the contact owns a 2018 gmc sierra 1500 equipped with goodyear wrangler sr-a tires, size: 265/60r2. while driving 75 mph, the contact noticed that all the tires had bubbles. the vehicle was taken to coulter buick gmc tempe (7780 s autoplex loop, tempe, az 85284, (480) 448-2471) for diagnostic testing where it was confirmed that the tread separated from the tires, which needed to be replaced. the tires were not replaced. the manufacturer was notified of the failure and informed the contact to call goodyear. the manufacturer provided case number: 1692419. the approximate vehicle failure mileage was 24,600. the tire failure mileage was 932.