Tire Sidewall problems of the 2002 Chevrolet C3500

Tire failure: the 2002 Chevrolet 3500 truck purchased had goodyear wrangler tires on as original equipment. They all bulged around the rim and eventually one "blew out" I took them to the goodyear dealer and they replaced them under road hazard. The replacement set ran half life and they started to bulge in the same spot. One blew out on the freeway. This time I replaced them with different tires, but saved the old ones in case you wished to look at them. Serious injury could happen from this and I think that if I had replaced them with goodyer tires, the problem would be burried within the company. If you are not interested then I need to recycle them.