general problems of the 2011 GMC Sierra 2500

The contact called on behalf of a fire department that owns a 2011 GMC Sierra 2500. The contact stated that while the fire department technician was performing a routine maintenance on the vehicle, the technician became aware that the sub frame was rusted with a hole in the sub frame. The vehicle was taken to the dealer, where it was determined that the sub frame needed to be replaced. The vehicle was not repaired. The contact related the failure to TSB number: 19-na-255. The manufacturer was notified of the failure and referred the contact to the NHTSA hotline for assistance. The failure mileage was approximately 29,252.