Tire Sidewall Problems of GMC Sierra 3500

I am reporting a potential safety defect involving goodyear wrangler trailrunner at tires size lt275/65r20. I purchased a new 2025 GMC Sierra 3500hd in August 2025. By the time the vehicle reached approximately 1,800 miles, noticeable sidewall bulges appeared on both rear tires. As a 36-year automotive professional, I recognized the serious safety risk posed by this condition and replaced all four tires at my own expense with a different brand. Since then, I have seen multiple reports of similar sidewall failures on brand-new trucks, which suggests this may be a systemic issue. Based on my experience and these reports, I believe this defect may be known to both goodyear and gm but has not been adequately addressed. I urge the national highway traffic safety administration (NHTSA) to investigate this matter to determine whether these tires pose a significant safety risk to the public. Vehicle information: make & model: 2025 GMC Sierra 3500hd tire model: goodyear wrangler trailrunner at tire size lt275/65r20. Mileage at issue: ~1,800 miles purchase date: August 2025 summary of issue: sidewall bulging on new tires, potential for blowout or loss of vehicle control.

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The contact owns a 2004 GMC Sierra 3500. The vehicle has power king towmax tires, size lt235/80r16e. While pulling the trailer at 65 mph, the sidewall on the passenger tire blew out. No repairs have been made. The cause of the failure was unknown. The failure mileage was 600.

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There was no event that was noted that would cause the separation of the tire tread from the sidewall. A major leak was noted. The split was located at the point of sidewall to tread joint. The tire has >9/32 of tread left on the tire. I am at a loss to replace the tire. No trauma was inflicted on the tire.

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