NHTSA Complaint #11709163 — 2010 CHEVROLET SILVERADO 1500

My truck tires were bought at Costco in 2015 and had 70k Warranty or 6yrs WCF. My added truck mileage since then is 12k miles. I discovered my driver rear passenger tire go flat . I put the spare and took it to Costco for repair. Costco informed me that this is a tire defect as the tire had a side wall perforation. Tire cannot be repaired and a new replacement is required. I looked up Michelin tire recalls and found one issued in 2013 about Michelin X-Radial tires discussing this same defect but it did not include my tire size ( P245/70R17 ) . Fortunately this incident did not occur while driving at high speed.