2005 GMC Savana 3500

We received a Safety Recall for our GMC 2005 G3500 school bus in the mail. The GM recall # is N222386050. The NHTSA Campaign ID number for this recall is 23V247. I have contacted our local dealer to resolve the recall and I was informed by the dealer that they are not sure if they can perform this type of work. I then called the Manufacturer's number on our recall letter to find out where to get this work done, I keep getting transferred to different departments only to reach voicemail boxes. Can anyone please let me know if this recall can be resolved by any nearby dealer or vehicle shop? My name is Diego, you can contact me at (914) 432-6929, and my email address is diegoc@hfadm.org. Attached to this complaint is the recall letter we received. I'm looking forward to hearing from someone. Thank you.

TL* THE CONTACT OWNS A 2005 GMC SAVANNA 3500 EQUIPPED WITH UNIROYAL LAREDO HD TIRES, SIZE: 245/75/R16. THE CONTACT STATED THAT BOTH REAR TIRES EXPERIENCED TREAD SEPARATION. THE MANUFACTURER WAS NOTIFIED AND INSTRUCTED THE CONTACT TO HAVE THE TIRES INSPECTED BY AN AUTHORIZED DEALER. THE CONTACT SCHEDULED AN APPOINTMENT TO HAVE THE VEHICLE INSPECTED. THE FAILURE MILEAGE OF THE TIRE AND THE VEHICLE WERE UNAVAILABLE. THE VIN WAS NOT AVAILABLE.

TL* THE CONTACT OWNS A 2005 GMC SAVANNA. THE CONTACT STATED THAT THE BRAKE PEDAL DEPRESSED DOWN TO THE FLOOR. THE CONTACT'S MECHANIC EXAMINED THE VEHICLE AND STATED THAT THE BRAKE BOOSTER WAS LEAKING FLUID. THE CONTACT SPOKE WITH THE MANUFACTURER AND WAS INFORMED THAT THERE WAS NO WARRANTY ON THE BRAKE BOOSTER. THE FAILURE AND CURRENT MILEAGES WERE 190,000.