general problems of the 1998 GMC Jimmy

Firestone firehawk tire shredded. Tire shredded itself after it was dirven approximately 700 miles.

I purchased 4 new le mans brand (made by and warranted by firestone) replacement tires for my 1998 GMC Jimmy. Thes tires are of the same size and have the same dot manufacturing code stamped upon them as do the tires involved in the firestone/Ford recall. While no falure of these 4 tires has occurred has the investigators at NHTSA deturmined all of the different brand name tires manufactured by firestone (and there will be many). I have seen no media information detailing the specific defect (what material or manufacturing process went wrong) that allows the tread to separate from the tire body. How can I be assured that my vehicle is presently equipped with tires that are not defective?.